Applies a given function to a federated value on tff.SERVER (deprecated).

fn A function to apply to the member content of arg on the tff.SERVER. The parameter of this function must be of the same type as the member constituent of arg.
arg A value of a TFF federated type placed at the tff.SERVER, and with the all_equal bit set.

A federated value on the tff.SERVER that represents the result of applying fn to the member constituent of arg.

TypeError If the arguments are not of the appropriate types.