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 |  |  |    public static final String CALLBACK_CMD_PLAY = "CALLBACK_PLAY";
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 |  |  |    public static final String CALLBACK_CMD_PLAYBACK = "CALLBACK_PLAYBACK";
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 |  |  |    public static final String CALLBACK_CMD_DOWNLOAD = "CALLBACK_DOWNLOAD";
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 |  |  |    public static final String CALLBACK_CMD_STOP = "CALLBACK_STOP";
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 |  |  |    public static final String UPLOAD_FILE_CHANNEL = "UPLOAD_FILE_CHANNEL";
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 |  |  |    public static final String CALLBACK_CMD_MOBILEPOSITION = "CALLBACK_MOBILEPOSITION";
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 |  |  |          if (result == null) {
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 |  |  |             return;
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 |  |  |          }
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 |  |  |          result.setResult(new ResponseEntity<>(msg.getData(),HttpStatus.OK));
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 |  |  |          result.setResult(ResponseEntity.ok().body(msg.getData()));
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 |  |  |       }
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 |  |  |       map.remove(msg.getKey());
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