diff --git a/build.gradle.kts b/build.gradle.kts
index 2551d64..0f31be3 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -42,11 +42,11 @@ xomrk {
                 compileTaskProvider.configure {
                     compilerOptions {
                         jvmTarget = JvmTarget.JVM_1_8
-                        freeCompilerArgs.addAll(
-                            "-Xno-call-assertions",
-                            "-Xno-param-assertions",
-                            "-Xno-receiver-assertions"
-                        )
+//                        freeCompilerArgs.addAll(
+//                            "-Xno-call-assertions",
+//                            "-Xno-param-assertions",
+//                            "-Xno-receiver-assertions"
+//                        )
                     }
                 }
             }
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/EnumeratedCollection.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/EnumeratedCollection.kt
index f29979f..a82c8a3 100644
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/EnumeratedCollection.kt
+++ b/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/EnumeratedCollection.kt
@@ -2,9 +2,11 @@ package ru.landgrafhomyak.utility.enumerated_collection
 
 import kotlin.jvm.JvmStatic
 
-internal abstract class EnumeratedCollection<E : Any>(
-	private val _data: Array<out E>,
+public abstract class EnumeratedCollection<E : Any>(
+	data: Array<out E>,
 ) : List<E> {
+	private val _data: Array<out E> = data
+
 	protected abstract fun _getElementOrdinal(e: E): Int
 	abstract override fun toString(): String
 
@@ -12,8 +14,6 @@ internal abstract class EnumeratedCollection<E : Any>(
 		get() = this._data.size
 
 	override operator fun contains(element: E): Boolean {
-		_Platform.jvm_assertNotNull(element, "param: element")
-
 		val ordinal = this._getElementOrdinal(element)
 		if (ordinal >= this.size)
 			return false
@@ -23,16 +23,12 @@ internal abstract class EnumeratedCollection<E : Any>(
 	}
 
 	override fun containsAll(elements: Collection<E>): Boolean {
-		_Platform.jvm_assertNotNull(elements, "param: elements")
-
 		if (elements === this) return true
 		return elements.all(this::contains)
 	}
 
 	override fun isEmpty(): Boolean = this._data.isEmpty()
 
-	fun isNotEmpty(): Boolean = this._data.isNotEmpty()
-
 	override operator fun iterator(): Iterator<E> = this._data.iterator()
 
 	override operator fun get(ordinal: Int): E {
@@ -44,8 +40,6 @@ internal abstract class EnumeratedCollection<E : Any>(
 	}
 
 	override fun indexOf(element: E): Int {
-		_Platform.jvm_assertNotNull(element, "param: element")
-
 		@Suppress("LiftReturnOrAssignment")
 		if (element in this)
 			return this._getElementOrdinal(element)
@@ -69,10 +63,10 @@ internal abstract class EnumeratedCollection<E : Any>(
 		override fun _getElementOrdinal(e: Any): Int = throw IllegalArgumentException("This method unexpected to be invoked")
 	}
 
-	companion object {
+	public companion object {
 		@Suppress("UNCHECKED_CAST")
 		@JvmStatic
-		fun <T : Any> empty(): EnumeratedCollection<T> = Empty as EnumeratedCollection<T>
+		public fun <T : Any> empty(): EnumeratedCollection<T> = Empty as EnumeratedCollection<T>
 	}
 
 	private inner class ListIteratorImpl(private var nextPos: Int) : ListIterator<E> {
@@ -110,7 +104,6 @@ internal abstract class EnumeratedCollection<E : Any>(
 		override fun isEmpty(): Boolean = this.size != 0
 
 		override fun contains(element: E): Boolean {
-			_Platform.jvm_assertNotNull(element, "param: element")
 			if (element !in this@EnumeratedCollection) return false
 			return this@EnumeratedCollection._getElementOrdinal(element) in (this._start..<this._end)
 		}
@@ -118,7 +111,6 @@ internal abstract class EnumeratedCollection<E : Any>(
 		override fun iterator(): Iterator<E> = this.listIterator()
 
 		override fun containsAll(elements: Collection<E>): Boolean {
-			_Platform.jvm_assertNotNull(elements, "param: elements")
 			if (elements === this) return true
 			return elements.all(this::contains)
 		}
@@ -126,7 +118,6 @@ internal abstract class EnumeratedCollection<E : Any>(
 		override fun get(index: Int): E = this@EnumeratedCollection[this._start + index]
 
 		override fun indexOf(element: E): Int {
-			_Platform.jvm_assertNotNull(element, "param: element")
 			if (element !in this) return -1
 			return this@EnumeratedCollection._getElementOrdinal(element) - this._start
 		}
diff --git a/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt b/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
deleted file mode 100644
index fc7a13c..0000000
--- a/src/commonMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
+++ /dev/null
@@ -1,7 +0,0 @@
-package ru.landgrafhomyak.utility.enumerated_collection
-
-@PublishedApi
-internal expect object _Platform {
-	@PublishedApi
-	internal inline fun jvm_assertNotNull(x: Any?, name: String)
-}
\ No newline at end of file
diff --git a/src/jvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt b/src/jvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
deleted file mode 100644
index 52e0fca..0000000
--- a/src/jvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package ru.landgrafhomyak.utility.enumerated_collection
-
-import java.util.Objects
-import kotlin.contracts.contract
-
-@PublishedApi
-internal actual object _Platform {
-	@Suppress("NOTHING_TO_INLINE")
-	@JvmStatic
-	@PublishedApi
-	internal actual inline fun jvm_assertNotNull(x: Any?, name: String) {
-		contract {
-			returns().implies(x != null)
-		}
-		Objects.requireNonNull(x, name)
-	}
-}
\ No newline at end of file
diff --git a/src/nonJvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt b/src/nonJvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
deleted file mode 100644
index 74d1485..0000000
--- a/src/nonJvmMain/kotlin/ru/landgrafhomyak/utility/enumerated_collection/_Platform.kt
+++ /dev/null
@@ -1,10 +0,0 @@
-package ru.landgrafhomyak.utility.enumerated_collection
-
-
-@PublishedApi
-internal actual object _Platform {
-	@Suppress("NOTHING_TO_INLINE")
-	@PublishedApi
-	internal actual inline fun jvm_assertNotNull(x: Any?, name: String) {
-	}
-}
\ No newline at end of file