text:     /**
       * @function toUppercase
       * @memberOf abl-sdk-feathers.directives
       * @description Transforms input text to all uppercase characters.
       * @example   <input type="text" ng-model="name" to-uppercase>
       */
      export default function toUppercase() {
          return {
              require: 'ngModel',
              link: function (scope, element, attrs, modelCtrl) {
                  var capitalize = function (inputValue) {
                      if (inputValue == undefined) inputValue = '';
                      var capitalized = inputValue.toUpperCase();
                      if (capitalized !== inputValue) {
                          modelCtrl.$setViewValue(capitalized);
                          modelCtrl.$render();
                      }
                      return capitalized;
                  }
  
                  modelCtrl.$parsers.push(capitalize);
                  capitalize(scope[attrs.ngModel]); // capitalize initial value
              }
          };
      }