`TWebsocketUpgrader`
pl	ro	OnAllow
pl	ro	OnMessageReceived
pl	ro	OnDisconnect
pl	ro	OnControlReceived
pl	ro	OnError
pl	ro	OnAllowUpgrade

`TCustomWebsocketUpgrader`
pt		OnAllowUpgrade

`TCustomWSServer`
pt		OnConnect
pt		OnAllow
pt		OnMessageReceived
pt		OnDisconnect
pt		OnControlReceived
pt		OnConnectionHandshake
pt		OnError