diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ChildCloseableState.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ChildCloseableState.kt
index 0738fd2..944278e 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ChildCloseableState.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ChildCloseableState.kt
@@ -15,12 +15,6 @@ public sealed class ChildCloseableState<T : CloseableState> : CloseableState {
 		this._state = state
 	}
 
-	override fun throwClosed(): Nothing =
-		this._state.throwClosed()
-
-	override fun throwInUse(): Nothing =
-		this._state.throwInUse()
-
 	override fun assertNotClosed(): Unit =
 		this._state.assertNotClosed()
 
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableState.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableState.kt
index 646c443..2017dc6 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableState.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableState.kt
@@ -1,9 +1,6 @@
 package ru.landgrafhomyak.utility.closeable_state_1
 
-public interface CloseableState : AutoCloseable {
-	public fun throwClosed(): Nothing
-	public fun throwInUse(): Nothing
-
+public interface CloseableState {
 	public fun assertNotClosed()
 
 	public val isClosed: Boolean
@@ -15,7 +12,7 @@ public interface CloseableState : AutoCloseable {
 	public fun finishUsage()
 
 	@ManualStateManipulation
-	public override fun close()
+	public fun close()
 
 	public interface AllowsConcurrency : CloseableState {
 
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableStateCloseableWrapper.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableStateCloseableWrapper.kt
index adb67f9..3d6e9d2 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableStateCloseableWrapper.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/CloseableStateCloseableWrapper.kt
@@ -8,12 +8,6 @@ public class CloseableStateCloseableWrapper(
 	override val isInUse: Boolean by this._self::isInUse
 	override val isClosed: Boolean by this._self::isInUse
 
-	override fun throwClosed(): Nothing =
-		this._self.throwClosed()
-
-	override fun throwInUse(): Nothing =
-		this._self.throwInUse()
-
 	override fun assertNotClosed(): Unit =
 		this._self.assertNotClosed()
 
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ErrorOnConcurrentAccessState.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ErrorOnConcurrentAccessState.kt
index f2e7a8f..3ecd9ff 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ErrorOnConcurrentAccessState.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/ErrorOnConcurrentAccessState.kt
@@ -15,15 +15,15 @@ public open class ErrorOnConcurrentAccessState : CloseableState.ExternallySynchr
 	public final override val isInUse: Boolean
 		get() = this._state.get() === State.IN_USE
 
-	public open override fun throwClosed(): Nothing {
+	protected open fun throwClosed(): Nothing {
 		throw IllegalStateException("Object is closed")
 	}
 
-	public open override fun throwInUse(): Nothing {
+	protected open fun throwInUse(): Nothing {
 		throw IllegalStateException("Failed close object because it is in use")
 	}
 
-	public open fun throwConcurrent(): Nothing {
+	protected open fun throwConcurrent(): Nothing {
 		throw IllegalStateException("Object is in use by another thread")
 	}
 
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/UsagesCounter.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/UsagesCounter.kt
index 26e1a28..83534ed 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/UsagesCounter.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/closeable_state_1/UsagesCounter.kt
@@ -17,11 +17,11 @@ public open class UsagesCounter : CloseableState.AllowsConcurrency {
 
 	public fun getCurrentUsagesCount(): Long = this._value.get()
 
-	public open override fun throwClosed(): Nothing {
+	protected open fun throwClosed(): Nothing {
 		throw IllegalStateException("Object is closed")
 	}
 
-	public open override fun throwInUse(): Nothing {
+	protected open fun throwInUse(): Nothing {
 		throw IllegalStateException("Failed close object because it is in use")
 	}