https://openjdk.java.net/ 
public interface sun.jvm.hotspot.utilities.MessageQueue
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: sun.jvm.hotspot.utilities.MessageQueue
  super_class: java.lang.Object
{
  public abstract java.lang.Object readMessage();
    descriptor: ()Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT

  public abstract java.lang.Object readMessageWithTimeout(long);
    descriptor: (J)Ljava/lang/Object;
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
        Name  Flags
      millis  

  public abstract void writeMessage(java.lang.Object);
    descriptor: (Ljava/lang/Object;)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
      Name  Flags
      obj   
}
SourceFile: "MessageQueue.java"