def METHOD_NAME(self, methods):
    """Return all available instruments for the given methods
    If no methods are given, all active instruments are returned
    """
    if methods:
        return list(chain(*map(lambda m: m.getCalculations(), methods)))
    query = {
        "portal_type": "Calculation",
        "is_active": True,
        "sort_on": "sortable_title"
    }
    brains = self.setup_catalog(query)
    return map(api.get_object, brains)