original_string: public function unregister($alias)
      {
          $this->_collection->remove($alias);
          $this->remove($alias);
          return $this;
      }
code: public function unregister($alias)
      {
          $this->_collection->remove($alias);
          $this->remove($alias);
          return $this;
      }
code_tokens: public function unregister ( $ alias ) { $ this -> _collection -> remove ( $ alias ) ; $ this -> remove ( $ alias ) ; return $ this ; }
docstring: Unregisters an asset from collection.
  
  @param string $alias
  @return $this
docstring_tokens: Unregisters an asset from collection .