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 
class org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1 implements org.eclipse.collections.api.block.procedure.primitive.CharProcedure
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1
  super_class: java.lang.Object
{
  private int index;
    descriptor: I
    flags: (0x0002) ACC_PRIVATE

  final org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet this$0;
    descriptor: Lorg/eclipse/collections/impl/map/mutable/primitive/AbstractMutableCharKeySet;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final char[] val$result;
    descriptor: [C
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet, char[]);
    descriptor: (Lorg/eclipse/collections/impl/map/mutable/primitive/AbstractMutableCharKeySet;[C)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1 this
         0: .line 546
            aload 0 /* this */
            aload 1
            putfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.this$0:Lorg/eclipse/collections/impl/map/mutable/primitive/AbstractMutableCharKeySet;
            aload 0 /* this */
            aload 2
            putfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.val$result:[C
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/map/mutable/primitive/AbstractMutableCharKeySet$1;
    MethodParameters:
            Name  Flags
      this$0      final
      val$result  final

  public void value(char);
    descriptor: (C)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1 this
        start local 1 // char each
         0: .line 552
            aload 0 /* this */
            getfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.val$result:[C
            aload 0 /* this */
            getfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.index:I
            iload 1 /* each */
            castore
         1: .line 553
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.index:I
            iconst_1
            iadd
            putfield org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1.index:I
         2: .line 554
            return
        end local 1 // char each
        end local 0 // org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    3     0  this  Lorg/eclipse/collections/impl/map/mutable/primitive/AbstractMutableCharKeySet$1;
            0    3     1  each  C
    MethodParameters:
      Name  Flags
      each  
}
SourceFile: "AbstractMutableCharKeySet.java"
EnclosingMethod: org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet.toArray:()[C
NestHost: org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet
InnerClasses:
  org.eclipse.collections.impl.map.mutable.primitive.AbstractMutableCharKeySet$1