https://openjdk.java.net/ 
interface com.sun.tools.jdi.CommandSender
  minor version: 0
  major version: 59
  flags: flags: (0x0600) ACC_INTERFACE, ACC_ABSTRACT
  this_class: com.sun.tools.jdi.CommandSender
  super_class: java.lang.Object
{
  public abstract com.sun.tools.jdi.PacketStream send();
    descriptor: ()Lcom/sun/tools/jdi/PacketStream;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "CommandSender.java"