https://openjdk.java.net/ 
public interface com.sun.tools.doclets.internal.toolkit.util.links.LinkOutput
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.tools.doclets.internal.toolkit.util.links.LinkOutput
  super_class: java.lang.Object
{
  public abstract void append(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      o     

  public abstract void insert(int, java.lang.Object);
    descriptor: (ILjava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      offset  
      o       
}
SourceFile: "LinkOutput.java"
    RuntimeVisibleAnnotations: 
      java.lang.Deprecated()