code: func (e *encoder) addBinary(subtype byte, v []byte) {
  	if subtype == 0x02 {
  		// Wonder how that brilliant idea came to life. Obsolete, luckily.
  		e.addInt32(int32(len(v) + 4))
  		e.addBytes(subtype)
  		e.addInt32(int32(len(v)))
  	} else {
  		e.addInt32(int32(len(v)))
  		e.addBytes(subtype)
  	}
  	e.addBytes(v...)
  }
docs: // --------------------------------------------------------------------------
  // Marshaling of base types.