diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 6a2d096..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,86 +0,0 @@
-version: 2.1
-jobs:
-  build:
-    working_directory: ~/code
-    docker:
-      - image: circleci/android:api-29
-    environment:
-      JVM_OPTS: -Xmx3200m
-    steps:
-      - checkout
-      - restore_cache:
-          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
-      - run:
-          name: Download Dependencies
-          command: ./gradlew androidDependencies
-      - save_cache:
-          paths:
-            - ~/.gradle
-          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
-
-  tests:
-    working_directory: ~/code
-    docker:
-      - image: circleci/android:api-29
-    environment:
-      JVM_OPTS: -Xmx3200m
-    steps:
-      - checkout
-      - restore_cache:
-          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
-      - store_artifacts:
-          path: app/build/reports
-          destination: reports
-      - run:
-          name: Run Lint Test
-          command: ./gradlew lint
-      - run:
-          name: Run Tests
-          command: ./gradlew lint test
-      - store_artifacts:
-          path: app/build/reports
-          destination: reports
-      - store_test_results:
-          path: app/build/test-results
-
-  deploy:
-    working_directory: ~/code
-    docker:
-      - image: circleci/android:api-29
-    environment:
-      JVM_OPTS: -Xmx3200m
-    steps:
-      - checkout
-      - restore_cache:
-          key: jars-{{ checksum "build.gradle" }}-{{ checksum  "app/build.gradle" }}
-      - run:
-          name: Build Library
-          command: ./gradlew :expandable-recyclerview:assembleRelease
-      - run:
-          name: Export key
-          command: |
-            mkdir expandable-recyclerview/maven
-            echo ${GPG_KEY_CONTENTS} | base64 -d --ignore-garbage > expandable-recyclerview/maven/secret.gpg
-      - run:
-          name: Staging
-          command: ./gradlew :expandable-recyclerview:publishReleasePublicationToSonatypeRepository
-      - run:
-          name: Release Library
-          command: ./gradlew closeAndReleaseRepository
-
-workflows:
-  version: 2.1
-  build-and-deploy:
-    jobs:
-      - build:
-          filters:  # required since `deploy` has tag filters AND requires `build`
-            tags:
-              only: /.*/
-      - deploy:
-          requires:
-            - build
-          filters:
-            tags:
-              only: /v[0-9]{1,3}\.[0-9]{1,3}\.?[0-9]{0,3}.*/
-            branches:
-              ignore: /.*/
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 8a21a2a..bc4d112 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -23,9 +23,6 @@ android {
     buildFeatures {
         viewBinding true
     }
-    dataBinding {
-        enabled = true
-    }
 }
 
 dependencies {
@@ -34,8 +31,7 @@ dependencies {
     implementation 'androidx.appcompat:appcompat:1.5.1'
     implementation 'androidx.core:core-ktx:1.9.0'
     implementation 'androidx.constraintlayout:constraintlayout:2.1.4'
-
-    implementation project(path: ':expandable-recyclerview')
+    implementation 'com.github.adriankuta:expandable-recyclerView:2.1.0'
 
     testImplementation 'junit:junit:4.13.2'
     androidTestImplementation 'androidx.test.ext:junit:1.1.4'
diff --git a/app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt b/app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt
index 500d361..a387d42 100644
--- a/app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt
+++ b/app/src/main/java/com/github/adriankuta/ExpandableAdapter.kt
@@ -3,6 +3,7 @@ package com.github.adriankuta
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import androidx.core.view.isGone
 import androidx.recyclerview.widget.RecyclerView
 import com.github.adriankuta.databinding.ItemLevel1Binding
 import com.github.adriankuta.databinding.ItemLevel2Binding
@@ -12,16 +13,16 @@ import com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode
 import com.github.adriankuta.expandable_recyclerview.expandableTree
 
 class ExpandableAdapter :
-    ExpandableRecyclerViewAdapter<String, ExpandableAdapter.ExpandableViewHolder>() {
+    ExpandableRecyclerViewAdapter<Region, ExpandableAdapter.ExpandableViewHolder>() {
 
-    private var tree: ExpandableTreeNode<String>? = null
+    private var tree: ExpandableTreeNode<Region>? = null
 
-    fun setTree(tree: ExpandableTreeNode<String>) {
+    fun setTree(tree: ExpandableTreeNode<Region>) {
         this.tree = tree
         notifyDataSetChanged()
     }
 
-    override fun getTreeNodes(): ExpandableTreeNode<String> = tree ?: expandableTree("")
+    override fun getTreeNodes(): ExpandableTreeNode<Region> = tree ?: expandableTree(Region(""))
 
     override fun onCreateViewHolder(parent: ViewGroup, nestLevel: Int): ExpandableViewHolder {
         return when (nestLevel) {
@@ -34,7 +35,7 @@ class ExpandableAdapter :
 
     override fun onBindViewHolder(
         holder: ExpandableViewHolder,
-        treeNode: ExpandableTreeNode<String>,
+        treeNode: ExpandableTreeNode<Region>,
         nestLevel: Int
     ) {
         holder.bind(treeNode) {
@@ -46,41 +47,65 @@ class ExpandableAdapter :
 
         class Level1(private val binding: ItemLevel1Binding) : ExpandableViewHolder(binding.root) {
             override fun bind(
-                node: ExpandableTreeNode<String>,
-                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+                node: ExpandableTreeNode<Region>,
+                onClickListener: ((ExpandableTreeNode<Region>) -> Unit)?
             ) {
-                binding.node = node
-                binding.root.setOnClickListener { onClickListener?.invoke(node) }
-                binding.executePendingBindings()
+                binding.apply {
+                    root.setOnClickListener { onClickListener?.invoke(node) }
+                    textView.text = node.value.name
+                    expandIcon.isGone = node.children.isEmpty()
+                    expandIcon.setImageResource(
+                        if (node.expanded)
+                            R.drawable.ic_expand_less_black_24dp
+                        else
+                            R.drawable.ic_expand_more_black_24dp
+                    )
+                }
             }
         }
 
         class Level2(private val binding: ItemLevel2Binding) : ExpandableViewHolder(binding.root) {
             override fun bind(
-                node: ExpandableTreeNode<String>,
-                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+                node: ExpandableTreeNode<Region>,
+                onClickListener: ((ExpandableTreeNode<Region>) -> Unit)?
             ) {
-                binding.node = node
-                binding.root.setOnClickListener { onClickListener?.invoke(node) }
-                binding.executePendingBindings()
+                binding.apply {
+                    root.setOnClickListener { onClickListener?.invoke(node) }
+                    textView.text = node.value.name
+                    expandIcon.isGone = node.children.isEmpty()
+                    expandIcon.setImageResource(
+                        if (node.expanded)
+                            R.drawable.ic_expand_less_black_24dp
+                        else
+                            R.drawable.ic_expand_more_black_24dp
+                    )
+                }
             }
         }
 
         class Level3(private val binding: ItemLevel3Binding) : ExpandableViewHolder(binding.root) {
             override fun bind(
-                node: ExpandableTreeNode<String>,
-                onClickListener: ((ExpandableTreeNode<String>) -> Unit)?
+                node: ExpandableTreeNode<Region>,
+                onClickListener: ((ExpandableTreeNode<Region>) -> Unit)?
             ) {
-                binding.node = node
-                binding.root.setOnClickListener { onClickListener?.invoke(node) }
-                binding.executePendingBindings()
+                binding.apply {
+                    root.setOnClickListener { onClickListener?.invoke(node) }
+                    textView.text = node.value.name
+                    expandIcon.isGone = node.children.isEmpty()
+                    expandIcon.setImageResource(
+                        if (node.expanded)
+                            R.drawable.ic_expand_less_black_24dp
+                        else
+                            R.drawable.ic_expand_more_black_24dp
+                    )
+                }
             }
         }
 
 
         abstract fun bind(
-            node: ExpandableTreeNode<String>,
-            onClickListener: ((ExpandableTreeNode<String>) -> Unit)? = null
+            node: ExpandableTreeNode<Region>,
+            onClickListener: ((ExpandableTreeNode<Region>) -> Unit)? = null
         )
 
     }
diff --git a/app/src/main/java/com/github/adriankuta/MainActivity.kt b/app/src/main/java/com/github/adriankuta/MainActivity.kt
index 59cd3f5..357e6c2 100644
--- a/app/src/main/java/com/github/adriankuta/MainActivity.kt
+++ b/app/src/main/java/com/github/adriankuta/MainActivity.kt
@@ -9,23 +9,24 @@ class MainActivity : AppCompatActivity() {
 
     private lateinit var binding: ActivityMainBinding
 
+
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
 
-        val tree = expandableTree("World") {
-            child("North America") {
-                child("USA")
+        val tree = expandableTree(Region("World")) {
+            child(Region("North America")) {
+                child(Region("USA"))
             }
-            child("Europe") {
-                child("Poland") {
-                    child("Warsaw")
+            child(Region("Europe")) {
+                child(Region("Poland")) {
+                    child(Region("Warsaw"))
                 }
-                child("Germany")
+                child(Region("Germany"))
             }
-            child("Asia") {
-                child("China")
+            child(Region("Asia")) {
+                child(Region("China"))
             }
         }
 
diff --git a/app/src/main/java/com/github/adriankuta/Region.kt b/app/src/main/java/com/github/adriankuta/Region.kt
new file mode 100644
index 0000000..4143684
--- /dev/null
+++ b/app/src/main/java/com/github/adriankuta/Region.kt
@@ -0,0 +1,3 @@
+package com.github.adriankuta
+
+data class Region(val name: String)
\ No newline at end of file
diff --git a/app/src/main/res/layout/item_level_1.xml b/app/src/main/res/layout/item_level_1.xml
index d87431d..8f5726d 100644
--- a/app/src/main/res/layout/item_level_1.xml
+++ b/app/src/main/res/layout/item_level_1.xml
@@ -1,44 +1,31 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
 
-    <data>
+    <ImageView
+        android:id="@+id/expand_icon"
+        android:layout_width="24dp"
+        android:layout_height="0dp"
+        android:scaleType="centerInside"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="@id/textView"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@id/textView"
+        tools:src="@drawable/ic_expand_less_black_24dp"
+        tools:visibility="visible" />
 
-        <variable
-            name="node"
-            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
-
-        <import type="android.view.View" />
-    </data>
-
-    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:app="http://schemas.android.com/apk/res-auto"
-        xmlns:tools="http://schemas.android.com/tools"
-        android:layout_width="match_parent"
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        tools:viewBindingIgnore="true">
-
-        <ImageView
-            android:id="@+id/expand_icon"
-            android:layout_width="24dp"
-            android:layout_height="0dp"
-            android:scaleType="centerInside"
-            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
-            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
-            app:layout_constraintBottom_toBottomOf="@id/textView"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="@id/textView"
-            tools:src="@drawable/ic_expand_less_black_24dp" />
-
-        <TextView
-            android:id="@+id/textView"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:padding="8dp"
-            android:text="@{node.value}"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toEndOf="@id/expand_icon"
-            app:layout_constraintTop_toTopOf="parent"
-            tools:text="@tools:sample/full_names" />
-    </androidx.constraintlayout.widget.ConstraintLayout>
-</layout>
\ No newline at end of file
+        android:padding="8dp"
+        android:text="@{node.value}"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@id/expand_icon"
+        app:layout_constraintTop_toTopOf="parent"
+        tools:text="@tools:sample/full_names" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/item_level_2.xml b/app/src/main/res/layout/item_level_2.xml
index f2a6084..e65ae06 100644
--- a/app/src/main/res/layout/item_level_2.xml
+++ b/app/src/main/res/layout/item_level_2.xml
@@ -1,46 +1,33 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
 
-    <data>
+    <ImageView
+        android:id="@+id/expand_icon"
+        android:layout_width="24dp"
+        android:layout_height="0dp"
+        android:layout_marginStart="24dp"
+        android:scaleType="centerInside"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="@id/textView"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@id/textView"
+        tools:src="@drawable/ic_expand_less_black_24dp"
+        tools:visibility="visible" />
 
-        <variable
-            name="node"
-            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
-
-        <import type="android.view.View" />
-    </data>
-
-    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:app="http://schemas.android.com/apk/res-auto"
-        xmlns:tools="http://schemas.android.com/tools"
-        android:layout_width="match_parent"
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        tools:viewBindingIgnore="true">
-
-        <ImageView
-            android:id="@+id/expand_icon"
-            android:layout_width="24dp"
-            android:layout_height="0dp"
-            android:layout_marginStart="24dp"
-            android:scaleType="centerInside"
-            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
-            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
-            app:layout_constraintBottom_toBottomOf="@id/textView"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="@id/textView"
-            tools:src="@drawable/ic_expand_less_black_24dp" />
-
-        <TextView
-            android:id="@+id/textView"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:padding="8dp"
-            android:text="@{node.value}"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toEndOf="@id/expand_icon"
-            app:layout_constraintTop_toTopOf="parent"
-            app:layout_goneMarginStart="48dp"
-            tools:text="@tools:sample/full_names" />
-    </androidx.constraintlayout.widget.ConstraintLayout>
-</layout>
\ No newline at end of file
+        android:padding="8dp"
+        android:text="@{node.value}"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@id/expand_icon"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_goneMarginStart="48dp"
+        tools:text="@tools:sample/full_names" />
+</androidx.constraintlayout.widget.ConstraintLayout>
diff --git a/app/src/main/res/layout/item_level_3.xml b/app/src/main/res/layout/item_level_3.xml
index a5e147f..64603f0 100644
--- a/app/src/main/res/layout/item_level_3.xml
+++ b/app/src/main/res/layout/item_level_3.xml
@@ -1,46 +1,33 @@
 <?xml version="1.0" encoding="utf-8"?>
-<layout>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="wrap_content">
 
-    <data>
+    <ImageView
+        android:id="@+id/expand_icon"
+        android:layout_width="24dp"
+        android:layout_height="0dp"
+        android:layout_marginStart="48dp"
+        android:scaleType="centerInside"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="@id/textView"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="@id/textView"
+        tools:src="@drawable/ic_expand_less_black_24dp"
+        tools:visibility="visible"/>
 
-        <variable
-            name="node"
-            type="com.github.adriankuta.expandable_recyclerview.ExpandableTreeNode&lt;String>" />
-
-        <import type="android.view.View" />
-    </data>
-
-    <androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:app="http://schemas.android.com/apk/res-auto"
-        xmlns:tools="http://schemas.android.com/tools"
-        android:layout_width="match_parent"
+    <TextView
+        android:id="@+id/textView"
+        android:layout_width="0dp"
         android:layout_height="wrap_content"
-        tools:viewBindingIgnore="true">
-
-        <ImageView
-            android:id="@+id/expand_icon"
-            android:layout_width="24dp"
-            android:layout_height="0dp"
-            android:layout_marginStart="48dp"
-            android:scaleType="centerInside"
-            android:src="@{node.expanded ? @drawable/ic_expand_more_black_24dp : @drawable/ic_expand_less_black_24dp}"
-            android:visibility="@{node.children.empty ? View.GONE : View.VISIBLE}"
-            app:layout_constraintBottom_toBottomOf="@id/textView"
-            app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toTopOf="@id/textView"
-            tools:src="@drawable/ic_expand_less_black_24dp" />
-
-        <TextView
-            android:id="@+id/textView"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:padding="8dp"
-            android:text="@{node.value}"
-            app:layout_constraintBottom_toBottomOf="parent"
-            app:layout_constraintEnd_toEndOf="parent"
-            app:layout_constraintStart_toEndOf="@id/expand_icon"
-            app:layout_constraintTop_toTopOf="parent"
-            app:layout_goneMarginStart="96dp"
-            tools:text="@tools:sample/full_names" />
-    </androidx.constraintlayout.widget.ConstraintLayout>
-</layout>
\ No newline at end of file
+        android:padding="8dp"
+        android:text="@{node.value}"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toEndOf="@id/expand_icon"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_goneMarginStart="96dp"
+        tools:text="@tools:sample/full_names" />
+</androidx.constraintlayout.widget.ConstraintLayout>