https://www.graalvm.org/ 
interface com.oracle.truffle.object.Debug$DebugShapeVisitor<R>
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.object.Debug$DebugShapeVisitor
  super_class: java.lang.Object
{
  public R visitShape(com.oracle.truffle.object.ShapeImpl);
    descriptor: (Lcom/oracle/truffle/object/ShapeImpl;)Ljava/lang/Object;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
        start local 0 // com.oracle.truffle.object.Debug$DebugShapeVisitor this
        start local 1 // com.oracle.truffle.object.ShapeImpl shape
         0: .line 197
            aload 0 /* this */
            aload 1 /* shape */
            aload 1 /* shape */
            invokevirtual com.oracle.truffle.object.ShapeImpl.getTransitionMapForRead:()Ljava/util/Map;
            invokestatic java.util.Collections.unmodifiableMap:(Ljava/util/Map;)Ljava/util/Map;
            invokeinterface com.oracle.truffle.object.Debug$DebugShapeVisitor.visitShape:(Lcom/oracle/truffle/object/ShapeImpl;Ljava/util/Map;)Ljava/lang/Object;
            areturn
        end local 1 // com.oracle.truffle.object.ShapeImpl shape
        end local 0 // com.oracle.truffle.object.Debug$DebugShapeVisitor this
      LocalVariableTable:
        Start  End  Slot   Name  Signature
            0    1     0   this  Lcom/oracle/truffle/object/Debug$DebugShapeVisitor<TR;>;
            0    1     1  shape  Lcom/oracle/truffle/object/ShapeImpl;
    Signature: (Lcom/oracle/truffle/object/ShapeImpl;)TR;
    MethodParameters:
       Name  Flags
      shape  

  public abstract R visitShape(com.oracle.truffle.object.ShapeImpl, java.util.Map<? extends com.oracle.truffle.object.Transition, ? extends com.oracle.truffle.object.ShapeImpl>);
    descriptor: (Lcom/oracle/truffle/object/ShapeImpl;Ljava/util/Map;)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Signature: (Lcom/oracle/truffle/object/ShapeImpl;Ljava/util/Map<+Lcom/oracle/truffle/object/Transition;+Lcom/oracle/truffle/object/ShapeImpl;>;)TR;
    MethodParameters:
             Name  Flags
      shape        
      transitions  
}
Signature: <R:Ljava/lang/Object;>Ljava/lang/Object;
SourceFile: "Debug.java"
NestHost: com.oracle.truffle.object.Debug
InnerClasses:
  abstract DebugShapeVisitor = com.oracle.truffle.object.Debug$DebugShapeVisitor of com.oracle.truffle.object.Debug