public static Either <L, Func <T2, R> > apply <L, T1, T2, R>(Either <L, Func <T1, T2, R> > either, Either <L, T1> arg) => either.Apply(arg);
public static Either <L, R> apply <L, T1, T2, R>(Either <L, Func <T1, T2, R> > either, Either <L, T1> arg1, Either <L, T2> arg2) => either.Apply(arg1, arg2);
public static Either <L, Res> apply <L, R, Res>(Either <L, Func <R, Res> > either, Either <L, R> arg) => either.Apply(arg);