code: public function addPathById($strId)
      {
          // Check if empty.
          if (empty($strId)) {
              return $this;
          }
  
          if (!Validator::isBinaryUuid($strId)) {
              $this->pendingIds[] = StringUtil::uuidToBin($strId);
              return $this;
          }
  
          $this->pendingIds[] = $strId;
          return $this;
      }
docs: Contao 3 DBAFS Support.
  
  @param string $strId String uuid of the file.
  
  @return ToolboxFile