code: public function move($baseDir, array $options, $username)
      {
          $this->resolveMoveOptions($options);
          if (array_key_exists("targetSlot", $options)) {
              $options["slot"] = $options["targetSlot"];
              $block = $this->moveBlockToAnotherSlot($baseDir, $options, $username);
  
              return $block;
          }
  
          $options["slot"] = $options["sourceSlot"];
          $block = $this->moveBlockToSameSlot($baseDir, $options, $username);
  
          return $block;
      }
docs: Moves the block
  
  @param string $sourceDir
  @param array $options
  @param string $username
  
  @return string The saved content