public IActionResult GetByManufacturer(string manufacturer)
        {
            if (String.IsNullOrEmpty(manufacturer))
            {
                ParameterNullException e = new ParameterNullException("The parameter cannot be null");
                return(BadRequest(e.Message));
            }

            try
            {
                return(Ok(_asmRepo.GetByManufacturerId(manufacturer)));
            }
            catch (ParameterNullException e)
            {
                return(BadRequest(e.Message));
            }
        }
 public IEnumerable <IAssemblyDto> GetByManufacturerId(string manufacturer)
 {
     return(_assemRepo.GetByManufacturerId(manufacturer));
 }