https://www.graalvm.org/ 
public interface com.oracle.truffle.sl.test.SLJavaInteropTest$PassInValues
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.sl.test.SLJavaInteropTest$PassInValues
  super_class: java.lang.Object
{
  public abstract void call(java.lang.Object, java.lang.Object);
    descriptor: (Ljava/lang/Object;Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      a     
      b     
}
SourceFile: "SLJavaInteropTest.java"
NestHost: com.oracle.truffle.sl.test.SLJavaInteropTest
InnerClasses:
  public abstract PassInValues = com.oracle.truffle.sl.test.SLJavaInteropTest$PassInValues of com.oracle.truffle.sl.test.SLJavaInteropTest
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()