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 
public class org.eclipse.collections.impl.UnmodifiableIteratorAdapter<E> implements java.util.Iterator<E>
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: org.eclipse.collections.impl.UnmodifiableIteratorAdapter
  super_class: java.lang.Object
{
  private final java.util.Iterator<? extends E> iterator;
    descriptor: Ljava/util/Iterator;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/util/Iterator<+TE;>;

  public void <init>(java.util.Iterator<? extends E>);
    descriptor: (Ljava/util/Iterator;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
        start local 1 // java.util.Iterator iterator
         0: .line 24
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 26
            aload 0 /* this */
            aload 1 /* iterator */
            putfield org.eclipse.collections.impl.UnmodifiableIteratorAdapter.iterator:Ljava/util/Iterator;
         2: .line 27
            return
        end local 1 // java.util.Iterator iterator
        end local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    3     0      this  Lorg/eclipse/collections/impl/UnmodifiableIteratorAdapter<TE;>;
            0    3     1  iterator  Ljava/util/Iterator<+TE;>;
    Signature: (Ljava/util/Iterator<+TE;>;)V
    MethodParameters:
          Name  Flags
      iterator  

  public boolean hasNext();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
         0: .line 32
            aload 0 /* this */
            getfield org.eclipse.collections.impl.UnmodifiableIteratorAdapter.iterator:Ljava/util/Iterator;
            invokeinterface java.util.Iterator.hasNext:()Z
            ireturn
        end local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/UnmodifiableIteratorAdapter<TE;>;

  public E next();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
         0: .line 38
            aload 0 /* this */
            getfield org.eclipse.collections.impl.UnmodifiableIteratorAdapter.iterator:Ljava/util/Iterator;
            invokeinterface java.util.Iterator.next:()Ljava/lang/Object;
            areturn
        end local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/UnmodifiableIteratorAdapter<TE;>;
    Signature: ()TE;

  public void remove();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
         0: .line 44
            new java.lang.UnsupportedOperationException
            dup
            new java.lang.StringBuilder
            dup
            ldc "Cannot call remove() on "
            invokespecial java.lang.StringBuilder.<init>:(Ljava/lang/String;)V
            aload 0 /* this */
            invokevirtual java.lang.Object.getClass:()Ljava/lang/Class;
            invokevirtual java.lang.Class.getSimpleName:()Ljava/lang/String;
            invokevirtual java.lang.StringBuilder.append:(Ljava/lang/String;)Ljava/lang/StringBuilder;
            invokevirtual java.lang.StringBuilder.toString:()Ljava/lang/String;
            invokespecial java.lang.UnsupportedOperationException.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // org.eclipse.collections.impl.UnmodifiableIteratorAdapter this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/UnmodifiableIteratorAdapter<TE;>;
}
Signature: <E:Ljava/lang/Object;>Ljava/lang/Object;Ljava/util/Iterator<TE;>;
SourceFile: "UnmodifiableIteratorAdapter.java"