https://openjdk.java.net/ 
public interface jdk.javadoc.internal.doclets.toolkit.DocFilesHandler
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: jdk.javadoc.internal.doclets.toolkit.DocFilesHandler
  super_class: java.lang.Object
{
  public abstract void copyDocFiles();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    Exceptions:
      throws jdk.javadoc.internal.doclets.toolkit.DocletException
}
SourceFile: "DocFilesHandler.java"