private InstallationCreateCommand(long externalId,
                                   bool isAirly,
                                   InstallationCreateCommandLocation location,
                                   InstallationCreateCommandAddress address,
                                   InstallationCreateCommandSponsor sponsor)
 {
     _externalId = externalId;
     _isAirly    = isAirly;
     _location   = location;
     _address    = address;
     _sponsor    = sponsor;
 }
 public static InstallationCreateCommand Create(long externalId,
                                                bool isAirly,
                                                InstallationCreateCommandLocation location,
                                                InstallationCreateCommandAddress address,
                                                InstallationCreateCommandSponsor sponsor)
 => new InstallationCreateCommand(externalId, isAirly, location, address, sponsor);