diff --git a/src/main/java/ru/touchin/roboswag/components/extensions/Delegates.kt b/src/main/java/ru/touchin/roboswag/components/extensions/Delegates.kt
index c8e0538..050bd6b 100644
--- a/src/main/java/ru/touchin/roboswag/components/extensions/Delegates.kt
+++ b/src/main/java/ru/touchin/roboswag/components/extensions/Delegates.kt
@@ -14,3 +14,11 @@ inline fun <T> Delegates.observable(
 ): ReadWriteProperty<Any?, T> = object : ObservableProperty<T>(initialValue) {
     override fun afterChange(property: KProperty<*>, oldValue: T, newValue: T) = onChange(newValue)
 }
+
+inline fun <T> Delegates.distinctUntilChanged(
+        initialValue: T,
+        crossinline onChange: (newValue: T) -> Unit
+): ReadWriteProperty<Any?, T> = object : ObservableProperty<T>(initialValue) {
+    override fun afterChange(property: KProperty<*>, oldValue: T, newValue: T) =
+            if (newValue != null && oldValue != newValue) onChange(newValue) else Unit
+}
diff --git a/src/main/java/ru/touchin/roboswag/components/utils/destroyable/BaseDestroyable.kt b/src/main/java/ru/touchin/roboswag/components/utils/destroyable/BaseDestroyable.kt
index 418f2c4..7d7f520 100644
--- a/src/main/java/ru/touchin/roboswag/components/utils/destroyable/BaseDestroyable.kt
+++ b/src/main/java/ru/touchin/roboswag/components/utils/destroyable/BaseDestroyable.kt
@@ -24,51 +24,41 @@ open class BaseDestroyable : Destroyable {
      */
     fun onDestroy() = subscriptions.dispose()
 
-    override fun <T> untilDestroy(
-            flowable: Flowable<T>,
+    override fun <T> Flowable<T>.untilDestroy(
             onNextAction: (T) -> Unit,
             onErrorAction: (Throwable) -> Unit,
             onCompletedAction: () -> Unit
-    ): Disposable = flowable
-            .observeOn(AndroidSchedulers.mainThread())
+    ): Disposable = observeOn(AndroidSchedulers.mainThread())
             .subscribe(onNextAction, onErrorAction, onCompletedAction)
             .also { subscriptions.add(it) }
 
-    override fun <T> untilDestroy(
-            observable: Observable<T>,
+    override fun <T> Observable<T>.untilDestroy(
             onNextAction: (T) -> Unit,
             onErrorAction: (Throwable) -> Unit,
             onCompletedAction: () -> Unit
-    ): Disposable = observable
-            .observeOn(AndroidSchedulers.mainThread())
+    ): Disposable = observeOn(AndroidSchedulers.mainThread())
             .subscribe(onNextAction, onErrorAction, onCompletedAction)
             .also { subscriptions.add(it) }
 
-    override fun <T> untilDestroy(
-            single: Single<T>,
+    override fun <T> Single<T>.untilDestroy(
             onSuccessAction: (T) -> Unit,
             onErrorAction: (Throwable) -> Unit
-    ): Disposable = single
-            .observeOn(AndroidSchedulers.mainThread())
+    ): Disposable = observeOn(AndroidSchedulers.mainThread())
             .subscribe(onSuccessAction, onErrorAction)
             .also { subscriptions.add(it) }
 
-    override fun untilDestroy(
-            completable: Completable,
+    override fun Completable.untilDestroy(
             onCompletedAction: () -> Unit,
             onErrorAction: (Throwable) -> Unit
-    ): Disposable = completable
-            .observeOn(AndroidSchedulers.mainThread())
+    ): Disposable = observeOn(AndroidSchedulers.mainThread())
             .subscribe(onCompletedAction, onErrorAction)
             .also { subscriptions.add(it) }
 
-    override fun <T> untilDestroy(
-            maybe: Maybe<T>,
+    override fun <T> Maybe<T>.untilDestroy(
             onSuccessAction: (T) -> Unit,
             onErrorAction: (Throwable) -> Unit,
             onCompletedAction: () -> Unit
-    ): Disposable = maybe
-            .observeOn(AndroidSchedulers.mainThread())
+    ): Disposable = observeOn(AndroidSchedulers.mainThread())
             .subscribe(onSuccessAction, onErrorAction, onCompletedAction)
             .also { subscriptions.add(it) }
 
diff --git a/src/main/java/ru/touchin/roboswag/components/utils/destroyable/Destroyable.kt b/src/main/java/ru/touchin/roboswag/components/utils/destroyable/Destroyable.kt
index b5c7c16..270318d 100644
--- a/src/main/java/ru/touchin/roboswag/components/utils/destroyable/Destroyable.kt
+++ b/src/main/java/ru/touchin/roboswag/components/utils/destroyable/Destroyable.kt
@@ -40,8 +40,7 @@ interface Destroyable {
      * @param T             Type of emitted by observable items;
      * @return [Disposable] which is wrapping source observable to unsubscribe from it onDestroy.
      */
-    fun <T> untilDestroy(
-            flowable: Flowable<T>,
+    fun <T> Flowable<T>.untilDestroy(
             onNextAction: (T) -> Unit = Functions.emptyConsumer<T>()::accept,
             onErrorAction: (Throwable) -> Unit = getActionThrowableForAssertion(Lc.getCodePoint(this, 2)),
             onCompletedAction: () -> Unit = Functions.EMPTY_ACTION::run
@@ -58,8 +57,7 @@ interface Destroyable {
      * @param T             Type of emitted by observable items;
      * @return [Disposable] which is wrapping source observable to unsubscribe from it onDestroy.
      */
-    fun <T> untilDestroy(
-            observable: Observable<T>,
+    fun <T> Observable<T>.untilDestroy(
             onNextAction: (T) -> Unit = Functions.emptyConsumer<T>()::accept,
             onErrorAction: (Throwable) -> Unit = getActionThrowableForAssertion(Lc.getCodePoint(this, 2)),
             onCompletedAction: () -> Unit = Functions.EMPTY_ACTION::run
@@ -76,8 +74,7 @@ interface Destroyable {
      * @param T               Type of emitted by single items;
      * @return [Disposable] which is wrapping source single to unsubscribe from it onDestroy.
      */
-    fun <T> untilDestroy(
-            single: Single<T>,
+    fun <T> Single<T>.untilDestroy(
             onSuccessAction: (T) -> Unit = Functions.emptyConsumer<T>()::accept,
             onErrorAction: (Throwable) -> Unit = getActionThrowableForAssertion(Lc.getCodePoint(this, 2))
     ): Disposable
@@ -92,8 +89,7 @@ interface Destroyable {
      * @param onErrorAction     Action which will raise on every [io.reactivex.CompletableEmitter.onError] throwable;
      * @return [Disposable] which is wrapping source completable to unsubscribe from it onDestroy.
      */
-    fun untilDestroy(
-            completable: Completable,
+    fun Completable.untilDestroy(
             onCompletedAction: () -> Unit = Functions.EMPTY_ACTION::run,
             onErrorAction: (Throwable) -> Unit = getActionThrowableForAssertion(Lc.getCodePoint(this, 2))
     ): Disposable
@@ -108,8 +104,7 @@ interface Destroyable {
      * @param onErrorAction   Action which will raise on every [io.reactivex.MaybeEmitter.onError] throwable;
      * @return [Disposable] which is wrapping source maybe to unsubscribe from it onDestroy.
      */
-    fun <T> untilDestroy(
-            maybe: Maybe<T>,
+    fun <T> Maybe<T>.untilDestroy(
             onSuccessAction: (T) -> Unit = Functions.emptyConsumer<T>()::accept,
             onErrorAction: (Throwable) -> Unit = getActionThrowableForAssertion(Lc.getCodePoint(this, 2)),
             onCompletedAction: () -> Unit = Functions.EMPTY_ACTION::run