def _load_cwr_defaults(self):
        """
        Loads the CWR default values file, creating a matrix from it, and then
        returns this data.

        The file will only be loaded once.

        :return: the CWR default values matrix
        """
        if self._cwr_defaults is None:
            self._cwr_defaults = self._reader.read_yaml_file(
                self._file_defaults)

        return self._cwr_defaults
def _load_cwr_defaults ( self ) : if self . _cwr_defaults is None : self . _cwr_defaults = self . _reader . read_yaml_file ( self . _file_defaults ) return self . _cwr_defaults
Loads the CWR default values file, creating a matrix from it, and then
        returns this data.

        The file will only be loaded once.

        :return: the CWR default values matrix