def METHOD_NAME(self):
    if self.model_type == 'ModEM':
        self._mfn_list = [fn for fn in os.listdir(self.cwd) if fn.endswith('.rho')]
        self._rfn_list = [fn for fn in os.listdir(self.cwd) if fn.endswith('.dat')]
    elif self.model_type == 'WS':
        self._mfn_list = [fn for fn in os.listdir(self.cwd) if fn.find('model')>=0]
        self._rfn_list = [fn for fn in os.listdir(self.cwd) if fn.find('resp')>=0]
    self.model_fn_combo.clear()
    self.model_fn_combo.addItems(self._mfn_list)
    self.resp_fn_combo.clear()
    self.resp_fn_combo.addItems(self._rfn_list)