[O] [beamer] What is the easiest way to inject latex code between block environments?

[Mikhail Titov]

Hello!

I would like to explicitly define heights for columns that contain blocks to be 
able to use \vfill [1] in-between blocks. And here comes the problem. I kind of 
need to inject

#+latex: \vfill

before new block

** block2

but after \end{block} was emitted, not before. Is there an easy way to approach 
that?

[1] 
http://tex.stackexchange.com/questions/15244/why-does-vfill-not-work-inside-a-beamer-column

Mikhail