code: function(requestId, exceptionMessage, exceptionType) {
  		if (exceptionType === "data") {
  			return protocol.implodeMessage(requestId, dataMethods.DATA_INIT,
  				exceptions.DATA, protocol.encodeString(exceptionMessage));
  		} else {
  			return protocol.implodeMessage(requestId, dataMethods.DATA_INIT,
  				exceptions.GENERIC, protocol.encodeString(exceptionMessage));
  		}
  	}
docs: Encodes an unsuccessful initialization reply.
  
  @param {String} requestId the originating request id
  @param {String} exceptionMessage the exception message
  @param {String} [exceptionType] the exception type. Allowed values: data
  @return {String} the encoded message
  @private