https://www.graalvm.org/ 
class com.oracle.truffle.object.dsl.processor.LayoutGenerator$3 implements com.oracle.truffle.object.dsl.processor.LayoutGenerator$PropertyIteratorAction
  minor version: 0
  major version: 59
  flags: flags: (0x0020) ACC_SUPER
  this_class: com.oracle.truffle.object.dsl.processor.LayoutGenerator$3
  super_class: java.lang.Object
{
  final com.oracle.truffle.object.dsl.processor.LayoutGenerator this$0;
    descriptor: Lcom/oracle/truffle/object/dsl/processor/LayoutGenerator;
    flags: (0x1010) ACC_FINAL, ACC_SYNTHETIC

  private final java.io.PrintStream val$stream;
    descriptor: Ljava/io/PrintStream;
    flags: (0x1012) ACC_PRIVATE, ACC_FINAL, ACC_SYNTHETIC

  void <init>(com.oracle.truffle.object.dsl.processor.LayoutGenerator, java.io.PrintStream);
    descriptor: (Lcom/oracle/truffle/object/dsl/processor/LayoutGenerator;Ljava/io/PrintStream;)V
    flags: (0x0000) 
    Code:
      stack=2, locals=3, args_size=3
        start local 0 // com.oracle.truffle.object.dsl.processor.LayoutGenerator$3 this
         0: .line 285
            aload 0 /* this */
            aload 1
            putfield com.oracle.truffle.object.dsl.processor.LayoutGenerator$3.this$0:Lcom/oracle/truffle/object/dsl/processor/LayoutGenerator;
            aload 0 /* this */
            aload 2
            putfield com.oracle.truffle.object.dsl.processor.LayoutGenerator$3.val$stream:Ljava/io/PrintStream;
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.object.dsl.processor.LayoutGenerator$3 this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/object/dsl/processor/LayoutGenerator$3;
    MethodParameters:
            Name  Flags
      this$0      final
      val$stream  final

  public void run(com.oracle.truffle.object.dsl.processor.model.PropertyModel, boolean);
    descriptor: (Lcom/oracle/truffle/object/dsl/processor/model/PropertyModel;Z)V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=3, args_size=3
        start local 0 // com.oracle.truffle.object.dsl.processor.LayoutGenerator$3 this
        start local 1 // com.oracle.truffle.object.dsl.processor.model.PropertyModel property
        start local 2 // boolean last
         0: .line 289
            aload 0 /* this */
            getfield com.oracle.truffle.object.dsl.processor.LayoutGenerator$3.val$stream:Ljava/io/PrintStream;
            ldc "            this.%s = %s;%n"
            iconst_2
            anewarray java.lang.Object
            dup
            iconst_0
            aload 1 /* property */
            invokevirtual com.oracle.truffle.object.dsl.processor.model.PropertyModel.getName:()Ljava/lang/String;
            aastore
            dup
            iconst_1
            aload 1 /* property */
            invokevirtual com.oracle.truffle.object.dsl.processor.model.PropertyModel.getName:()Ljava/lang/String;
            aastore
            invokevirtual java.io.PrintStream.printf:(Ljava/lang/String;[Ljava/lang/Object;)Ljava/io/PrintStream;
            pop
         1: .line 290
            return
        end local 2 // boolean last
        end local 1 // com.oracle.truffle.object.dsl.processor.model.PropertyModel property
        end local 0 // com.oracle.truffle.object.dsl.processor.LayoutGenerator$3 this
      LocalVariableTable:
        Start  End  Slot      Name  Signature
            0    2     0      this  Lcom/oracle/truffle/object/dsl/processor/LayoutGenerator$3;
            0    2     1  property  Lcom/oracle/truffle/object/dsl/processor/model/PropertyModel;
            0    2     2      last  Z
    MethodParameters:
          Name  Flags
      property  
      last      
}
SourceFile: "LayoutGenerator.java"
EnclosingMethod: com.oracle.truffle.object.dsl.processor.LayoutGenerator.generateObjectType:(Ljava/io/PrintStream;)V
NestHost: com.oracle.truffle.object.dsl.processor.LayoutGenerator
InnerClasses:
  com.oracle.truffle.object.dsl.processor.LayoutGenerator$3
  private abstract PropertyIteratorAction = com.oracle.truffle.object.dsl.processor.LayoutGenerator$PropertyIteratorAction of com.oracle.truffle.object.dsl.processor.LayoutGenerator