Issue #2776661 by brandonlira, ameymudras, er.pushpinderrana, quietone,...

        return;

      }

      // If $form_state->isRebuilding() has been set and input has been

      // If $form_state->setRebuild(TRUE) was called and input has been

      // processed without validation errors, we are in a multi-step workflow

      // that is not yet complete. A new $form needs to be constructed based on

      // the changes made to $form_state during this request. Normally, a submit

      // handler sets $form_state->isRebuilding() if a fully executed form

      // requires another step. However, for forms that have not been fully

      // executed (e.g., Ajax submissions triggered by non-buttons), there is no

      // submit handler to set $form_state->isRebuilding(). It would not make

      // sense to redisplay the identical form without an error for the user to

      // correct, so we also rebuild error-free non-executed forms, regardless

      // that is not yet complete. A new $form needs to be constructed based

      // on the changes made to $form_state during this request.

      //

      // Typically, a submit handler calls $form_state->setRebuild(TRUE) when

      // a fully executed form requires another step. However, for forms that

      // have not been fully executed (e.g., AJAX submissions triggered by

      // non-buttons), there is no submit handler to call setRebuild(). In

      // that case, we also rebuild error-free, non-executed forms, regardless

      // of $form_state->isRebuilding().

      // @todo Simplify this logic; considering Ajax and non-HTML front-ends,

      //   along with element-level #submit properties, it makes no sense to