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.multimap.AbstractMutableMultimap$2PutProcedure implements org.eclipse.collections.api.block.procedure.Procedure2<KK, org.eclipse.collections.api.collection.MutableCollection<VV>>
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure
  super_class: java.lang.Object
{
  private static final long serialVersionUID;
    descriptor: J
    flags: (0x001a) ACC_PRIVATE, ACC_STATIC, ACC_FINAL
    ConstantValue: 1

  private boolean changed;
    descriptor: Z
    flags: (0x0002) ACC_PRIVATE

  final org.eclipse.collections.impl.multimap.AbstractMutableMultimap this$0;
    descriptor: Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  void <init>(org.eclipse.collections.impl.multimap.AbstractMutableMultimap);
    descriptor: (Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=2, args_size=2
        start local 0 // org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure this
         0: .line 240
            aload 0 /* this */
            aload 1
            putfield org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure.this$0:Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap$2PutProcedure;
    MethodParameters:
        Name  Flags
      this$0  final

  public void value(KK, org.eclipse.collections.api.collection.MutableCollection<VV>);
    descriptor: (Ljava/lang/Object;Lorg/eclipse/collections/api/collection/MutableCollection;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=5, locals=3, args_size=3
        start local 0 // org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure this
        start local 1 // java.lang.Object key
        start local 2 // org.eclipse.collections.api.collection.MutableCollection value
         0: .line 249
            aload 0 /* this */
            dup
            getfield org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure.changed:Z
            aload 0 /* this */
            getfield org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure.this$0:Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap;
            aload 1 /* key */
            aload 2 /* value */
            invokevirtual org.eclipse.collections.impl.multimap.AbstractMutableMultimap.putAll:(Ljava/lang/Object;Ljava/lang/Iterable;)Z
            ior
            putfield org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure.changed:Z
         1: .line 250
            return
        end local 2 // org.eclipse.collections.api.collection.MutableCollection value
        end local 1 // java.lang.Object key
        end local 0 // org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    2     0   this  Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap$2PutProcedure;
            0    2     1    key  TKK;
            0    2     2  value  Lorg/eclipse/collections/api/collection/MutableCollection<TVV;>;
    Signature: (TKK;Lorg/eclipse/collections/api/collection/MutableCollection<TVV;>;)V
    MethodParameters:
       Name  Flags
      key    
      value  

  public void value(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x1041) ACC_PUBLIC, ACC_BRIDGE, ACC_SYNTHETIC
    Code:
      stack=3, locals=3, args_size=3
         0: .line 1
            aload 0
            aload 1
            checkcast java.lang.Object
            aload 2
            checkcast org.eclipse.collections.api.collection.MutableCollection
            invokevirtual org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure.value:(Ljava/lang/Object;Lorg/eclipse/collections/api/collection/MutableCollection;)V
            return
      LocalVariableTable:
        Start  End  Slot  Name  Signature
}
Signature: Ljava/lang/Object;Lorg/eclipse/collections/api/block/procedure/Procedure2<TKK;Lorg/eclipse/collections/api/collection/MutableCollection<TVV;>;>;
SourceFile: "AbstractMutableMultimap.java"
EnclosingMethod: org.eclipse.collections.impl.multimap.AbstractMutableMultimap.putAllAbstractMutableMultimap:(Lorg/eclipse/collections/impl/multimap/AbstractMutableMultimap;)Z
NestHost: org.eclipse.collections.impl.multimap.AbstractMutableMultimap
InnerClasses:
  PutProcedure = org.eclipse.collections.impl.multimap.AbstractMutableMultimap$2PutProcedure