public QueryConceptosHandler(ConceptosContext dbContext, IMapper mapper)
 {
     this._dbContext = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
     this._mapper    = mapper ?? throw new ArgumentNullException(nameof(mapper));
 }
 public CreateUpdateConceptoCommandHandler(ConceptosContext dbContext, IEventEmitter eventEmitter, ICommandEventConverter converter)
 {
     this._dbContext    = dbContext ?? throw new ArgumentNullException(nameof(dbContext));
     this._eventEmitter = eventEmitter ?? throw new ArgumentNullException(nameof(eventEmitter));
     this._converter    = converter ?? throw new ArgumentNullException(nameof(converter));
 }