https://www.graalvm.org/ 
public interface com.oracle.svm.jni.nativeapi.JNIFieldId extends org.graalvm.word.PointerBase
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.oracle.svm.jni.nativeapi.JNIFieldId
  super_class: java.lang.Object
{
}
SourceFile: "JNIFieldId.java"
    RuntimeVisibleAnnotations: 
      org.graalvm.nativeimage.c.CContext(value = Lcom/oracle/svm/jni/nativeapi/JNIHeaderDirectives;)
      org.graalvm.nativeimage.c.struct.CStruct(value = "_jfieldID", addStructKeyword = true, isIncomplete = true)