Method to create child refcounters

build.gradle.kts

@@ -15,7 +15,7 @@ buildscript {
 }
 
 group = "ru.landgrafhomyak.utility"
-version = "0.3"
+version = "0.4"
 
 repositories {
 	mavenCentral()

src/commonMain/kotlin/ru/landrafhomyak/utility/reference_counter/MayBeClosedReferenceCounter.kt

@@ -91,4 +91,41 @@ public sealed class MayBeClosedReferenceCounter {
 		else
 			return "<ref counter [${refcntCached}]>"
 	}
+
+	@Suppress("LEAKED_IN_PLACE_LAMBDA", "WRONG_INVOCATION_KIND")
+	@JvmName("child")
+	public fun <R> child(errMessageClosed: String, errExistRefs: String, scope: (MayBeClosedReferenceCounter) -> R): R {
+		contract {
+			callsInPlace(scope, InvocationKind.EXACTLY_ONCE)
+		}
+
+		_Platform.jvm_assertNotNull(errMessageClosed, "param: errMessageClosed")
+		_Platform.jvm_assertNotNull(errExistRefs, "param: errExistRefs")
+		_Platform.jvm_assertNotNull(scope, "param: scope")
+
+		this.withRef {
+			return CloseableReferenceCounter.autoClosed(
+				errMessageClosed = errMessageClosed,
+				errExistRefs = errExistRefs,
+				scope = scope
+			)
+		}
+	}
+
+	@Suppress("LEAKED_IN_PLACE_LAMBDA", "WRONG_INVOCATION_KIND")
+	@JvmName("child_inheritErrMessage")
+	public fun <R> child_inheritErrMessage(errExistRefs: String, scope: (MayBeClosedReferenceCounter) -> R): R {
+		contract {
+			callsInPlace(scope, InvocationKind.EXACTLY_ONCE)
+		}
+
+		_Platform.jvm_assertNotNull(errExistRefs, "param: errExistRefs")
+		_Platform.jvm_assertNotNull(scope, "param: scope")
+
+		return this.child(
+			errMessageClosed = this._errMessageClosed,
+			errExistRefs = errExistRefs,
+			scope = scope
+		)
+	}
 }