map<C, R> method
Implementation
Either<C, R> map<C, R>(C Function(L) f) => _either.fold(
(L l) => Left<C, R>(f(this._value)),
(_) => Right<C, R>((_either as Right)._value));
Either<C, R> map<C, R>(C Function(L) f) => _either.fold(
(L l) => Left<C, R>(f(this._value)),
(_) => Right<C, R>((_either as Right)._value));