code: def ffl_path(self, site, frametype):
          
          try:
              return self.paths[(site, frametype)]
          except KeyError:
              self._find_paths()
              return self.paths[(site, frametype)]
docs: Returns the path of the FFL file for the given site and frametype
  
          Examples
          --------
          >>> from gwpy.io.datafind import FflConnection
          >>> conn = FflConnection()
          >>> print(conn.ffl_path('V', 'V1Online'))
          /virgoData/ffl/V1Online.ffl