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 
final class org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure<T> implements org.eclipse.collections.api.block.procedure.Procedure<T>
  minor version: 0
  major version: 59
  flags: flags: (0x0030) ACC_FINAL, ACC_SUPER
  this_class: org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private final java.lang.Appendable appendable;
    descriptor: Ljava/lang/Appendable;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL

  private void <init>(java.lang.Appendable);
    descriptor: (Ljava/lang/Appendable;)V
    flags: (0x0002) ACC_PRIVATE
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
        start local 1 // java.lang.Appendable appendable
         0: .line 168
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 170
            aload 0 /* this */
            aload 1 /* appendable */
            putfield org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure.appendable:Ljava/lang/Appendable;
         2: .line 171
            return
        end local 1 // java.lang.Appendable appendable
        end local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
      LocalVariableTable:
        Start  End  Slot        Name  Signature
            0    3     0        this  Lorg/eclipse/collections/impl/block/factory/Procedures$AppendProcedure<TT;>;
            0    3     1  appendable  Ljava/lang/Appendable;
    MethodParameters:
            Name  Flags
      appendable  

  public void value();
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=3, args_size=2
        start local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
        start local 1 // java.lang.Object each
         0: .line 178
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure.appendable:Ljava/lang/Appendable;
            aload 1 /* each */
            invokestatic java.lang.String.valueOf:(Ljava/lang/Object;)Ljava/lang/String;
            invokeinterface java.lang.Appendable.append:(Ljava/lang/CharSequence;)Ljava/lang/Appendable;
            pop
         1: .line 179
            goto 4
         2: .line 180
      StackMap locals:
      StackMap stack: java.io.IOException
            astore 2 /* e */
        start local 2 // java.io.IOException e
         3: .line 182
            new java.lang.RuntimeException
            dup
            aload 2 /* e */
            invokespecial java.lang.RuntimeException.<init>:(Ljava/lang/Throwable;)V
            athrow
        end local 2 // java.io.IOException e
         4: .line 184
      StackMap locals:
      StackMap stack:
            return
        end local 1 // java.lang.Object each
        end local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    5     0  this  Lorg/eclipse/collections/impl/block/factory/Procedures$AppendProcedure<TT;>;
            0    5     1  each  TT;
            3    4     2     e  Ljava/io/IOException;
      Exception table:
        from    to  target  type
           0     1       2  Class java.io.IOException
    Signature: (TT;)V
    MethodParameters:
      Name  Flags
      each  

  public java.lang.String toString();
    descriptor: ()Ljava/lang/String;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
         0: .line 189
            aload 0 /* this */
            getfield org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure.appendable:Ljava/lang/Appendable;
            invokevirtual java.lang.Object.toString:()Ljava/lang/String;
            areturn
        end local 0 // org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/block/factory/Procedures$AppendProcedure<TT;>;
}
Signature: <T:Ljava/lang/Object;>Ljava/lang/Object;Lorg/eclipse/collections/api/block/procedure/Procedure<TT;>;
SourceFile: "Procedures.java"
NestHost: org.eclipse.collections.impl.block.factory.Procedures
InnerClasses:
  private final AppendProcedure = org.eclipse.collections.impl.block.factory.Procedures$AppendProcedure of org.eclipse.collections.impl.block.factory.Procedures