https://www.graalvm.org/ 
public class com.oracle.truffle.api.dsl.test.examples.Interop
  minor version: 0
  major version: 59
  flags: flags: (0x0021) ACC_PUBLIC, ACC_SUPER
  this_class: com.oracle.truffle.api.dsl.test.examples.Interop
  super_class: java.lang.Object
{
  public void <init>();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.examples.Interop this
         0: .line 61
            aload 0 /* this */
            invokespecial java.lang.Object.<init>:()V
            return
        end local 0 // com.oracle.truffle.api.dsl.test.examples.Interop this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/examples/Interop;

  public void testInterop();
    descriptor: ()V
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=1, args_size=1
        start local 0 // com.oracle.truffle.api.dsl.test.examples.Interop this
         0: .line 65
            new java.lang.Error
            dup
            ldc "Unresolved compilation problem: \n\tUseInteropNodeGen cannot be resolved\n"
            invokespecial java.lang.Error.<init>:(Ljava/lang/String;)V
            athrow
        end local 0 // com.oracle.truffle.api.dsl.test.examples.Interop this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/api/dsl/test/examples/Interop;
    RuntimeVisibleAnnotations: 
      org.junit.Test()
}
SourceFile: "Interop.java"
NestMembers:
  com.oracle.truffle.api.dsl.test.examples.Interop$TruffleObject  com.oracle.truffle.api.dsl.test.examples.Interop$TruffleObject$1  com.oracle.truffle.api.dsl.test.examples.Interop$TruffleObjectOperation  com.oracle.truffle.api.dsl.test.examples.Interop$UseInterop
InnerClasses:
  public TruffleObject = com.oracle.truffle.api.dsl.test.examples.Interop$TruffleObject of com.oracle.truffle.api.dsl.test.examples.Interop
  public abstract TruffleObjectOperation = com.oracle.truffle.api.dsl.test.examples.Interop$TruffleObjectOperation of com.oracle.truffle.api.dsl.test.examples.Interop
  public UseInterop = com.oracle.truffle.api.dsl.test.examples.Interop$UseInterop of com.oracle.truffle.api.dsl.test.examples.Interop