diff --git a/kala-collection/src/main/java/kala/collection/mutable/MutableCollection.java b/kala-collection/src/main/java/kala/collection/mutable/MutableCollection.java
index 23b55933..9b47b5e4 100644
--- a/kala-collection/src/main/java/kala/collection/mutable/MutableCollection.java
+++ b/kala-collection/src/main/java/kala/collection/mutable/MutableCollection.java
@@ -1,97 +1,110 @@
-package kala.collection.mutable;
-
-import kala.collection.Collection;
-import kala.collection.internal.convert.AsJavaConvert;
-import kala.collection.factory.CollectionFactory;
-import org.jetbrains.annotations.Contract;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Iterator;
-import java.util.Objects;
-import java.util.stream.Collector;
-import java.util.stream.Stream;
-
-public interface MutableCollection<E> extends Collection<E>, MutableAnyCollection<E> {
-
-    //region Static Factories
-
-    static <E> @NotNull CollectionFactory<E, ?, MutableCollection<E>> factory() {
-        return CollectionFactory.narrow(MutableSeq.factory());
-    }
-
-    static <E> @NotNull MutableCollection<E> of() {
-        return MutableSeq.of();
-    }
-
-    @Contract("_ -> new")
-    static <E> @NotNull MutableCollection<E> of(E value1) {
-        return MutableSeq.of(value1);
-    }
-
-    @Contract("_, _ -> new")
-    static <E> @NotNull MutableCollection<E> of(E value1, E value2) {
-        return MutableSeq.of(value1, value2);
-    }
-
-    @Contract("_, _, _ -> new")
-    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3) {
-        return MutableSeq.of(value1, value2, value3);
-    }
-
-    @Contract("_, _, _, _ -> new")
-    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3, E value4) {
-        return MutableSeq.of(value1, value2, value3, value4);
-    }
-
-    @Contract("_, _, _, _, _ -> new")
-    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3, E value4, E value5) {
-        return MutableSeq.of(value1, value2, value3, value4, value5);
-    }
-
-    @SafeVarargs
-    static <E> @NotNull MutableCollection<E> of(E... values) {
-        return from(values);
-    }
-
-    static <E> @NotNull MutableCollection<E> from(E @NotNull [] values) {
-        return MutableSeq.from(values);
-    }
-
-    static <E> @NotNull MutableCollection<E> from(@NotNull Iterable<? extends E> values) {
-        return MutableSeq.from(values);
-    }
-
-    static <E> @NotNull MutableCollection<E> from(@NotNull Iterator<? extends E> it) {
-        return MutableSeq.from(it);
-    }
-
-    static <E> @NotNull MutableCollection<E> from(@NotNull Stream<? extends E> stream) {
-        return MutableSeq.from(stream);
-    }
-
-    static <E, C extends MutableCollection<E>> @NotNull MutableCollectionEditor<E, C> edit(@NotNull C collection) {
-        return new MutableCollectionEditor<>(collection);
-    }
-
-    //endregion
-
-    @Override
-    default @NotNull String className() {
-        return "MutableCollection";
-    }
-
-    @Override
-    default <U> @NotNull CollectionFactory<U, ?, ? extends MutableCollection<U>> iterableFactory() {
-        return factory();
-    }
-
-    @Override
-    default @NotNull java.util.Collection<E> asJava() {
-        return new AsJavaConvert.MutableCollectionAsJava<>(this);
-    }
-
-    @SuppressWarnings({"MethodDoesntCallSuperMethod"})
-    default @NotNull MutableCollection<E> clone() {
-        return this.<E>iterableFactory().from(this);
-    }
-}
+/*
+ * Copyright 2024 Glavo
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package kala.collection.mutable;
+
+import kala.collection.Collection;
+import kala.collection.internal.convert.AsJavaConvert;
+import kala.collection.factory.CollectionFactory;
+import org.jetbrains.annotations.Contract;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Iterator;
+import java.util.stream.Stream;
+
+public interface MutableCollection<E> extends Collection<E>, MutableAnyCollection<E> {
+
+    //region Static Factories
+
+    static <E> @NotNull CollectionFactory<E, ?, MutableCollection<E>> factory() {
+        return CollectionFactory.narrow(MutableSeq.factory());
+    }
+
+    static <E> @NotNull MutableCollection<E> of() {
+        return MutableSeq.of();
+    }
+
+    @Contract("_ -> new")
+    static <E> @NotNull MutableCollection<E> of(E value1) {
+        return MutableSeq.of(value1);
+    }
+
+    @Contract("_, _ -> new")
+    static <E> @NotNull MutableCollection<E> of(E value1, E value2) {
+        return MutableSeq.of(value1, value2);
+    }
+
+    @Contract("_, _, _ -> new")
+    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3) {
+        return MutableSeq.of(value1, value2, value3);
+    }
+
+    @Contract("_, _, _, _ -> new")
+    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3, E value4) {
+        return MutableSeq.of(value1, value2, value3, value4);
+    }
+
+    @Contract("_, _, _, _, _ -> new")
+    static <E> @NotNull MutableCollection<E> of(E value1, E value2, E value3, E value4, E value5) {
+        return MutableSeq.of(value1, value2, value3, value4, value5);
+    }
+
+    @SafeVarargs
+    static <E> @NotNull MutableCollection<E> of(E... values) {
+        return from(values);
+    }
+
+    static <E> @NotNull MutableCollection<E> from(E @NotNull [] values) {
+        return MutableSeq.from(values);
+    }
+
+    static <E> @NotNull MutableCollection<E> from(@NotNull Iterable<? extends E> values) {
+        return MutableSeq.from(values);
+    }
+
+    static <E> @NotNull MutableCollection<E> from(@NotNull Iterator<? extends E> it) {
+        return MutableSeq.from(it);
+    }
+
+    static <E> @NotNull MutableCollection<E> from(@NotNull Stream<? extends E> stream) {
+        return MutableSeq.from(stream);
+    }
+
+    static <E, C extends MutableCollection<E>> @NotNull MutableCollectionEditor<E, C> edit(@NotNull C collection) {
+        return new MutableCollectionEditor<>(collection);
+    }
+
+    //endregion
+
+    @Override
+    default @NotNull String className() {
+        return "MutableCollection";
+    }
+
+    @Override
+    default <U> @NotNull CollectionFactory<U, ?, ? extends MutableCollection<U>> iterableFactory() {
+        return factory();
+    }
+
+    @Override
+    default @NotNull java.util.Collection<E> asJava() {
+        return new AsJavaConvert.MutableCollectionAsJava<>(this);
+    }
+
+    @SuppressWarnings({"MethodDoesntCallSuperMethod"})
+    default @NotNull MutableCollection<E> clone() {
+        return this.<E>iterableFactory().from(this);
+    }
+}