public PingRequest(SystemIdentifier system, ServerIdentifier server)
 {
     System = system;
     Server = server;
 }
 public SystemIdentifierBuilder WithServer(ServerIdentifier server)
 {
     this.server = server;
     return this;
 }
 public SystemIdentifierBuilder()
 {
     server = ServerIdentifier.Create();
 }
 public SystemIdentifier(string systemName, ServerIdentifier server)
 {
     Name = systemName;
     Server = server;
 }