code: private void handleEnd(GuacamoleInstruction instruction) {
  
          // Verify all required arguments are present
          List<String> args = instruction.getArgs();
          if (args.size() < 1)
              return;
  
          // Terminate stream
          closeInterceptedStream(args.get(0));
  
      }
docs: Handles a single "end" instruction, closing the associated
  OutputStream. If no OutputStream is associated with the stream index
  within the "end" instruction, this function has no effect.
  
  @param instruction
  The "end" instruction being handled.