https://openjdk.java.net/ 
public interface javax.sound.midi.Receiver extends java.lang.AutoCloseable
  minor version: 0
  major version: 59
  flags: flags: (0x0601) ACC_PUBLIC, ACC_INTERFACE, ACC_ABSTRACT
  this_class: javax.sound.midi.Receiver
  super_class: java.lang.Object
{
  public abstract void send(javax.sound.midi.MidiMessage, long);
    descriptor: (Ljavax/sound/midi/MidiMessage;J)V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
    MethodParameters:
           Name  Flags
      message    
      timeStamp  

  public abstract void close();
    descriptor: ()V
    flags: (0x0401) ACC_PUBLIC, ACC_ABSTRACT
}
SourceFile: "Receiver.java"