https://github.com/eclipse/eclipse-collections/eclipse-collections: Eclipse Collections is a collections framework for Java. It has JDK-compatible List, Set and Map implementations with a rich API and set of utility classes that work with any JDK compatible Collections, Arrays, Maps or Strings. The iteration protocol was inspired by the Smalltalk collection framework.
  • Craig P. Motlin
  • Donald Raab
  • Mohammad A. Rezaei
  • Hiroshi Ito
  • Nikhil J. Nanivadekar
  • Sirisha Pratha 
public class org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection<T> extends org.eclipse.collections.impl.collection.mutable.AbstractUnmodifiableMutableCollection<T> implements java.io.Serializable
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection
  super_class: org.eclipse.collections.impl.collection.mutable.AbstractUnmodifiableMutableCollection
{
  void <init>(org.eclipse.collections.api.collection.MutableCollection<? extends T>);
    descriptor: (Lorg/eclipse/collections/api/collection/MutableCollection;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection this
        start local 1 // org.eclipse.collections.api.collection.MutableCollection collection
         0: .line 29
            aload 0 /* this */
            aload 1 /* collection */
            invokespecial org.eclipse.collections.impl.collection.mutable.AbstractUnmodifiableMutableCollection.<init>:(Lorg/eclipse/collections/api/collection/MutableCollection;)V
         1: .line 30
            return
        end local 1 // org.eclipse.collections.api.collection.MutableCollection collection
        end local 0 // org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    2     0        this  Lorg/eclipse/collections/impl/collection/mutable/UnmodifiableMutableCollection<TT;>;
            0    2     1  collection  Lorg/eclipse/collections/api/collection/MutableCollection<+TT;>;
    Signature: (Lorg/eclipse/collections/api/collection/MutableCollection<+TT;>;)V
    MethodParameters:
            Name  Flags
      collection  

  public static <E, C extends java.util.Collection<E>> org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection<E> of(C);
    descriptor: (Ljava/util/Collection;)Lorg/eclipse/collections/impl/collection/mutable/UnmodifiableMutableCollection;
    flags: (0x0009) ACC_PUBLIC, ACC_STATIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // java.util.Collection collection
         0: .line 39
            aload 0 /* collection */
            ifnonnull 2
         1: .line 41
            new java.lang.IllegalArgumentException
            dup
            ldc "cannot create a UnmodifiableMutableCollection for null"
            invokespecial java.lang.IllegalArgumentException.<init>:(Ljava/lang/String;)V
            athrow
         2: .line 43
      StackMap locals:
      StackMap stack:
            new org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection
            dup
            aload 0 /* collection */
            invokestatic org.eclipse.collections.impl.collection.mutable.CollectionAdapter.adapt:(Ljava/util/Collection;)Lorg/eclipse/collections/api/collection/MutableCollection;
            invokespecial org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection.<init>:(Lorg/eclipse/collections/api/collection/MutableCollection;)V
            areturn
        end local 0 // java.util.Collection collection
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0  collection  TC;
    Signature: <E:Ljava/lang/Object;C::Ljava/util/Collection<TE;>;>(TC;)Lorg/eclipse/collections/impl/collection/mutable/UnmodifiableMutableCollection<TE;>;
    MethodParameters:
            Name  Flags
      collection  

  protected java.lang.Object writeReplace();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0004) ACC_PROTECTED
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection this
         0: .line 48
            new org.eclipse.collections.impl.collection.mutable.UnmodifiableCollectionSerializationProxy
            dup
            aload 0 /* this */
            invokevirtual org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection.getMutableCollection:()Lorg/eclipse/collections/api/collection/MutableCollection;
            invokespecial org.eclipse.collections.impl.collection.mutable.UnmodifiableCollectionSerializationProxy.<init>:(Lorg/eclipse/collections/api/collection/MutableCollection;)V
            areturn
        end local 0 // org.eclipse.collections.impl.collection.mutable.UnmodifiableMutableCollection this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/collection/mutable/UnmodifiableMutableCollection<TT;>;
}
Signature: <T:Ljava/lang/Object;>Lorg/eclipse/collections/impl/collection/mutable/AbstractUnmodifiableMutableCollection<TT;>;Ljava/io/Serializable;
SourceFile: "UnmodifiableMutableCollection.java"