public final class javafx.collections.WeakMapChangeListener<K, V> implements javafx.collections.MapChangeListener<K, V>, javafx.beans.WeakListener
  minor version: 0
  major version: 59
  flags: flags: (0x0031) ACC_PUBLIC, ACC_FINAL, ACC_SUPER
  this_class: javafx.collections.WeakMapChangeListener
  super_class: java.lang.Object
{
  private final java.lang.ref.WeakReference<javafx.collections.MapChangeListener<K, V>> ref;
    descriptor: Ljava/lang/ref/WeakReference;
    flags: (0x0012) ACC_PRIVATE, ACC_FINAL
    Signature: Ljava/lang/ref/WeakReference<Ljavafx/collections/MapChangeListener<TK;TV;>;>;

  public void <init>(javafx.collections.MapChangeListener<K, V>);
    descriptor: (Ljavafx/collections/MapChangeListener;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=4, locals=2, args_size=2
        start local 0 // javafx.collections.WeakMapChangeListener this
        start local 1 // javafx.collections.MapChangeListener listener
         0: .line 66
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
         1: .line 67
            aload 1 /* listener */
            ifnonnull 3
         2: .line 68
            new java.lang.NullPointerException
            dup
            ldc "Listener must be specified."
            invokespecial java.lang.NullPointerException.<init>:(Ljava/lang/String;)V
            athrow
         3: .line 70
      StackMap locals: javafx.collections.WeakMapChangeListener javafx.collections.MapChangeListener
      StackMap stack:
            aload 0 /* this */
            new java.lang.ref.WeakReference
            dup
            aload 1 /* listener */
            invokespecial java.lang.ref.WeakReference.<init>:(Ljava/lang/Object;)V
            putfield javafx.collections.WeakMapChangeListener.ref:Ljava/lang/ref/WeakReference;
         4: .line 71
            return
        end local 1 // javafx.collections.MapChangeListener listener
        end local 0 // javafx.collections.WeakMapChangeListener this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    5     0      this  Ljavafx/collections/WeakMapChangeListener<TK;TV;>;
            0    5     1  listener  Ljavafx/collections/MapChangeListener<TK;TV;>;
    Signature: (Ljavafx/collections/MapChangeListener<TK;TV;>;)V
    RuntimeVisibleParameterAnnotations: 
      0:
        javafx.beans.NamedArg(value = "listener")
    MethodParameters:
          Name  Flags
      listener  

  public boolean wasGarbageCollected();
    descriptor: ()Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // javafx.collections.WeakMapChangeListener this
         0: .line 78
            aload 0 /* this */
            getfield javafx.collections.WeakMapChangeListener.ref:Ljava/lang/ref/WeakReference;
            invokevirtual java.lang.ref.WeakReference.get:()Ljava/lang/Object;
            ifnonnull 1
            iconst_1
            ireturn
      StackMap locals:
      StackMap stack:
         1: iconst_0
            ireturn
        end local 0 // javafx.collections.WeakMapChangeListener this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    2     0  this  Ljavafx/collections/WeakMapChangeListener<TK;TV;>;

  public void onChanged(javafx.collections.MapChangeListener$Change<? extends K, ? extends V>);
    descriptor: (Ljavafx/collections/MapChangeListener$Change;)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=2, locals=3, args_size=2
        start local 0 // javafx.collections.WeakMapChangeListener this
        start local 1 // javafx.collections.MapChangeListener$Change change
         0: .line 86
            aload 0 /* this */
            getfield javafx.collections.WeakMapChangeListener.ref:Ljava/lang/ref/WeakReference;
            invokevirtual java.lang.ref.WeakReference.get:()Ljava/lang/Object;
            checkcast javafx.collections.MapChangeListener
            astore 2 /* listener */
        start local 2 // javafx.collections.MapChangeListener listener
         1: .line 87
            aload 2 /* listener */
            ifnull 4
         2: .line 88
            aload 2 /* listener */
            aload 1 /* change */
            invokeinterface javafx.collections.MapChangeListener.onChanged:(Ljavafx/collections/MapChangeListener$Change;)V
         3: .line 89
            goto 5
         4: .line 93
      StackMap locals: javafx.collections.MapChangeListener
      StackMap stack:
            aload 1 /* change */
            invokevirtual javafx.collections.MapChangeListener$Change.getMap:()Ljavafx/collections/ObservableMap;
            aload 0 /* this */
            invokeinterface javafx.collections.ObservableMap.removeListener:(Ljavafx/collections/MapChangeListener;)V
         5: .line 95
      StackMap locals:
      StackMap stack:
            return
        end local 2 // javafx.collections.MapChangeListener listener
        end local 1 // javafx.collections.MapChangeListener$Change change
        end local 0 // javafx.collections.WeakMapChangeListener this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    6     0      this  Ljavafx/collections/WeakMapChangeListener<TK;TV;>;
            0    6     1    change  Ljavafx/collections/MapChangeListener$Change<+TK;+TV;>;
            1    6     2  listener  Ljavafx/collections/MapChangeListener<TK;TV;>;
    Signature: (Ljavafx/collections/MapChangeListener$Change<+TK;+TV;>;)V
    MethodParameters:
        Name  Flags
      change  
}
Signature: <K:Ljava/lang/Object;V:Ljava/lang/Object;>Ljava/lang/Object;Ljavafx/collections/MapChangeListener<TK;TV;>;Ljavafx/beans/WeakListener;
SourceFile: "WeakMapChangeListener.java"
InnerClasses:
  public abstract Change = javafx.collections.MapChangeListener$Change of javafx.collections.MapChangeListener