https://www.graalvm.org/ 
interface com.oracle.svm.tutorial.CInterfaceTutorial$D2 extends org.graalvm.word.PointerBase
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.svm.tutorial.CInterfaceTutorial$D2
  super_class: java.lang.Object
{
  public abstract long getLongValue();
    descriptor: ()J
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.struct.CField(value = "long_value")

  public abstract org.graalvm.nativeimage.c.type.CLongPointer getValuePointer();
    descriptor: ()Lorg/graalvm/nativeimage/c/type/CLongPointer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.struct.CFieldAddress(value = "long_value")

  public abstract org.graalvm.nativeimage.c.type.CLongPointer getLongPointer();
    descriptor: ()Lorg/graalvm/nativeimage/c/type/CLongPointer;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.struct.CField(value = "long_pointer")
}
SourceFile: "CInterfaceTutorial.java"
NestHost: com.oracle.svm.tutorial.CInterfaceTutorial
InnerClasses:
  abstract D2 = com.oracle.svm.tutorial.CInterfaceTutorial$D2 of com.oracle.svm.tutorial.CInterfaceTutorial
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.struct.CStruct(value = "d2_t")