https://www.graalvm.org/ 
interface com.oracle.truffle.polyglot.PolyglotImpl$VMObject
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.polyglot.PolyglotImpl$VMObject
  super_class: java.lang.Object
{
  public abstract com.oracle.truffle.polyglot.PolyglotEngineImpl getEngine();
    descriptor: ()Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public com.oracle.truffle.polyglot.PolyglotImpl getImpl();
    descriptor: ()Lcom/oracle/truffle/polyglot/PolyglotImpl;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.PolyglotImpl$VMObject this
         0: .line 599
            aload 0 /* this */
            invokeinterface com.oracle.truffle.polyglot.PolyglotImpl$VMObject.getEngine:()Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            getfield com.oracle.truffle.polyglot.PolyglotEngineImpl.impl:Lcom/oracle/truffle/polyglot/PolyglotImpl;
            areturn
        end local 0 // com.oracle.truffle.polyglot.PolyglotImpl$VMObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/PolyglotImpl$VMObject;

  public org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess getAPIAccess();
    descriptor: ()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=1, locals=1, args_size=1
        start local 0 // com.oracle.truffle.polyglot.PolyglotImpl$VMObject this
         0: .line 603
            aload 0 /* this */
            invokeinterface com.oracle.truffle.polyglot.PolyglotImpl$VMObject.getEngine:()Lcom/oracle/truffle/polyglot/PolyglotEngineImpl;
            getfield com.oracle.truffle.polyglot.PolyglotEngineImpl.impl:Lcom/oracle/truffle/polyglot/PolyglotImpl;
            invokevirtual com.oracle.truffle.polyglot.PolyglotImpl.getAPIAccess:()Lorg/graalvm/polyglot/impl/AbstractPolyglotImpl$APIAccess;
            areturn
        end local 0 // com.oracle.truffle.polyglot.PolyglotImpl$VMObject this
      LocalVariableTable:
        Start  End  Slot  Name  Signature
            0    1     0  this  Lcom/oracle/truffle/polyglot/PolyglotImpl$VMObject;
}
SourceFile: "PolyglotImpl.java"
NestHost: com.oracle.truffle.polyglot.PolyglotImpl
InnerClasses:
  abstract VMObject = com.oracle.truffle.polyglot.PolyglotImpl$VMObject of com.oracle.truffle.polyglot.PolyglotImpl
  public abstract APIAccess = org.graalvm.polyglot.impl.AbstractPolyglotImpl$APIAccess of org.graalvm.polyglot.impl.AbstractPolyglotImpl