storage/interface.go
func (f QueryableFunc) Querier(ctx context.Context, mint, maxt int64) (Querier, error) {
	return f(ctx, mint, maxt)
}
func (f QueryableFunc) Querier(ctx context.Context, mint, maxt int64) (Querier, error) {
	return f(ctx, mint, maxt)
}
// Querier calls f() with the given parameters.