original_string: protected static function _getMimeExtensionMap()
      {
          if (is_null(self::$_map)) {
              require __DIR__ . '/mime.mapping.php';
              self::$_map = $mime_extension_map;
          }
  
          return self::$_map;
      }
code: protected static function _getMimeExtensionMap()
      {
          if (is_null(self::$_map)) {
              require __DIR__ . '/mime.mapping.php';
              self::$_map = $mime_extension_map;
          }
  
          return self::$_map;
      }
code_tokens: protected static function _getMimeExtensionMap ( ) { if ( is_null ( self :: $ _map ) ) { require __DIR__ . '/mime.mapping.php' ; self :: $ _map = $ mime_extension_map ; } return self :: $ _map ; }
docstring: Returns a copy of the MIME extension map.
  
  @return array  The MIME extension map.
docstring_tokens: Returns a copy of the MIME extension map .