public IEnumerable <MemberProjection> Method(Expression <Func <T, Delegate> > expr, Delegate functor)
 {
     return(EnumerableEx.OfOne(
                Implement <T> .For(expr, functor)));
 }
 public IEnumerable <MemberProjection> Method(Expression <Action <T> > action, Delegate functor)
 {
     return(EnumerableEx.OfOne(
                Implement <T> .For(action, functor)));
 }