docs: function setProperty(key, value, successCallback, errorCallback) {
          return neon.util.ajaxUtils.doPost(
              neon.serviceUrl('propertyservice', key), {
                  data: value,
                  contentType: 'text/plain',
                  success: successCallback,
                  error: errorCallback,
                  responseType: 'json'
              }
          );
      }