code: function pathCurrentAct()
  {
    let self = this;
    _.assert( arguments.length === 0 || arguments.length === 1 );
  
    if( arguments.length === 1 && arguments[ 0 ] )
    {
      let path = arguments[ 0 ];
      _.assert( self.path.is( path ) );
      self._currentPath = path;
    }
  
    let result = self._currentPath;
  
    return result;
  }
docs: -- path --