Returning Types from TMap

Ok, I have a TMap with custom types in it

I want to return a type instance from the map, using ValueForKey and then run a method in the returned instance

If I simply return the instance to a variable, it complains that the method doesnt exist and wont compile the program

If I declair the variable to be of the same custom type, it complains that it cant convert from Object to the custom type

The only way around this I can think of is to somehow get ValueForKey to return the instance as its type, instead of as an object

However I've been unable to find a way to do this

Can you cast the object back to the desired type?
mytype:TType=ttype(returnedobject)

"Unable to convert from Int to <unknown>"

That makes absolutly no sense to me because I declaired everything to be the right type before hand, and there are no integers involved

Edit: Dont worry I got it, I made an error implimenting your fix

Ty for the help, much apreciated