[boost] IS THERE A WAY TO FIND IF A CERTAIN TYPE HAS A CERTAIN MEMBER?

HI,

I have read that via enable_if and other constructs, one can declare a member of a type conditionally.

What I need is a way to be able to test whether a certain type has a certain method or member data, so that I can call it or use it accordingly.

Does boost have something like this??

Regards, Juan