Hyy!!
I’ve a function in my BP_PlayerController called getDestination.
I wanted to call this function in another BP.
How can I do this?
Is there a way to call variables and function from another BP?
GetPlayerController → Cast to your type of controller → function name 
Ooh. What “Cast to your type of controller” do?
A thousand thanks! Maybe I expressed myself badly, but I really wanted to know how the “CAST” worked
How it works?
It converts a generic player controller into a specific player controller.
Is that what you mean?