Multiple Session.AddHandler for the same event

[Malix-off]

Using Session.AddHandler, is there a difference between calling it once, and calling it multiple times with each having the same event parameter?
Should we only call it once per event?

[Earlopain]

Event handlers are saved internally in a map[string][]*eventHandlerInstance{} where string is the event handler type. Registering event handlers for the same event multiple times is not an issue.