[Orgmode] Orgmode and matlab again.

[Piter_]

Hi all.
Can some one point me out part of code from babel-org and python-babel
which is responsible for opening python code in python mode and
putting it back in orgmode.
I've tried to read files in lang directory of babel, but my knowledge
of lisp did not let me to figure it out. I wanted to connect emacs
matlab mode and hope it will help me to do it.
Thanks.
Petro.