.Future!: ClassType
.Future!.
result: (self: Ref Future!) -> Obj
exception: (self: Ref Future!) -> Exception
done: (self: Ref Future!) -> Bool
cancelled: (self: Ref Future!) -> Bool
set_result!: (self: RefMut Future!, result: Obj) => NoneType
set_exception!: (self: RefMut Future!, exception: Exception) => NoneType
cancel!: (self: RefMut Future!, msg := Str) => Bool
.isfuture: (obj: Obj) -> Bool