https://openjdk.java.net/ 
public interface com.sun.xml.internal.xsom.XSModelGroupDecl extends com.sun.xml.internal.xsom.XSDeclaration, com.sun.xml.internal.xsom.XSTerm
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.xml.internal.xsom.XSModelGroupDecl
  super_class: java.lang.Object
{
  public abstract com.sun.xml.internal.xsom.XSModelGroup getModelGroup();
    descriptor: ()Lcom/sun/xml/internal/xsom/XSModelGroup;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "XSModelGroupDecl.java"