@classmethod
def is_datasource_for(cls, **kwargs):
    """
        Determines if header corresponds to a GOES lightcurve
        `~sunpy.timeseries.TimeSeries`.
        """
    if 'source' in kwargs.keys():
        if kwargs.get('source', ''):
            return kwargs.get('source', '').lower().startswith(cls._source)
    if 'meta' in kwargs.keys():
        return kwargs['meta'].get('TELESCOP', '').startswith('GOES')
