code: function getSubmitBtnChildren(formEl) {
            var submitBtnEls = [];
            var allButtonEls = formEl.find(angularPromiseButtons.config.BTN_SELECTOR);
  
            for (var i = 0; i < allButtonEls.length; i++) {
              var btnEl = allButtonEls[i];
              if (angular.element(btnEl)
                .attr('type') === 'submit') {
                submitBtnEls.push(btnEl);
              }
            }
            return angular.element(submitBtnEls);
          }
docs: Get's all submit button children of the given element
  @param {Object}formEl
  @returns {Object}