original_string: public function getMetadata($key)
      {
          return isset($this->_metadata[$key])
              ? $this->_metadata[$key]
              : null;
      }
code: public function getMetadata($key)
      {
          return isset($this->_metadata[$key])
              ? $this->_metadata[$key]
              : null;
      }
code_tokens: public function getMetadata ( $ key ) { return isset ( $ this -> _metadata [ $ key ] ) ? $ this -> _metadata [ $ key ] : null ; }
docstring: Retrieves metadata from this object.
  
  @param string $key  The metadata key.
  
  @return mixed  The metadata, or null if it doesn't exist.
docstring_tokens: Retrieves metadata from this object .