public static string GetInstanceName <TEntity, TContext>(
     this ReadonlyRepo <TEntity, TContext> repo)
     where TEntity : class, new()
     where TContext : DbContext
 {
     return(TestRepoFactory.READONLY_INSTANCE_NAME);
 }
 public ReadonlyController(ReadonlyRepo <TEntity, TContext> repo)
 {
     _repo = repo;
 }