code: function validateCallbacks(options) {
              if (options.successCallback && typeof options.successCallback !== 'function') {
                  throw new Error(TAG + 'Success callback must be a function.');
              } else {
                  options.successCallback = options.successCallback || enplug.noop;
              }
  
              if (options.errorCallback && typeof options.errorCallback !== 'function') {
                  throw new Error(TAG + 'Error callback must be a function.');
              } else {
                  options.errorCallback = options.errorCallback || enplug.noop;
              }
          }
docs: Validate and assign defaults for callback methods.
  @param {MethodCall} options