docs: function (successResponse, request, callback) {
              var res;
              if (!successResponse.responseXML
                      || (successResponse.responseXML && !successResponse.responseXML.documentElement)) {
                  res = {
                      response : null,
                      error : true,
                      errorData : {
                          "messageBean" : {
                              "localizedMessage" : this.MIMETYPE_ERROR,
                              "type" : "TYPEERROR"
                          }
                      }
                  };
              } else {
                  res = this.processXMLDocument(successResponse.responseXML.documentElement, request);
              }
              this.$callback(callback, res);
          }