func (c *Collection) searchFaces(input *SDK.SearchFacesInput) (*SearchFacesResponse, error) {
    svc := c.service
    op, err := svc.client.SearchFaces(input)
    if err != nil {
        svc.Errorf("error on `SearchFaces` operation; collection=%s; error=%s;", c.nameWithPrefix, err.Error())