Question about alias and getOverloads

[uranuz]

I apologise that I need to revive this discussion again. But 
still I got answer to only one of my questions. I know that it is 
a common practice in programmers society that when someone asks 
more than 1 question. Then people who answer them usually choose 
only one of these questions that is the most easiest to answer. 
But the rest of the questions are just ignored. But the topic is 
still considered resolved. Person who answered `increased his 
carma`. All are happy. Except for the man who asked the question, 
but only got answer that is trivial, easy-to-answer or 
easy-to-find by himself. And actually got the answer to only one 
of the questions. And it is the less important.

At my job in this case I usually ask questions only one by one. 
It gives to person that shall try to answer no options and to 
answer only to this question. So only when I got answer that 
satisfies me I start to ask the next question.
I didn't want to use this technique there, because I believe that 
D community is better...

Sorry for this disgression, but I still don't understand several 
main points:
1. Why API for __traits(getOverloads) is so strange. Why I need 
to find parent for symbol myself and pass actual symbol name as 
string, but not actually pass a symbol itself? It is very strange 
to me...
2. Where in the documentation is mentioned that when I create 
alias to name that is a function or method that has overloads 
then this alias is actually an alias not only for the first or 
second or randomly selected overload in overload set, but an 
alias for all of overloads in set at the same time?

Thanks. Have a good day!