https://www.graalvm.org/ 
public interface com.oracle.truffle.sl.test.SLJavaInteropTest$ValuesRaw
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.truffle.sl.test.SLJavaInteropTest$ValuesRaw
  super_class: java.lang.Object
{
  public abstract java.lang.Object values(java.lang.Object, java.lang.String, int);
    descriptor: (Ljava/lang/Object;Ljava/lang/String;I)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
       Name  Flags
      sum    
      key    
      value  
}
SourceFile: "SLJavaInteropTest.java"
NestHost: com.oracle.truffle.sl.test.SLJavaInteropTest
InnerClasses:
  public abstract ValuesRaw = com.oracle.truffle.sl.test.SLJavaInteropTest$ValuesRaw of com.oracle.truffle.sl.test.SLJavaInteropTest
    RuntimeVisibleAnnotations: 
      java.lang.FunctionalInterface()