[O] mark src blocks feature proposal

[Uwe Brauer]

Hello

Please consider

#+begin_src matlab :results output

y = dsolve('Dy = y^2 - y^3','y(0) = 1/100')
y = simplify(y)
set(gca,'FontSize',18)

fplot('1/(lambertw(99*exp(1)*exp(99)*exp(-t-1))+1)',[0 200 -0.15 1.13])
grid on
print -dpng  lambertw.png 
#+end_src

In auctex, there is a cool function called 
LaTeX-mark-environment which marks a latex environment
such as

\begin{equation}
  \label{eq:README:1}
  \frac{dy}{dt}=y^2(1-y)
\end{equation}

There is no similar function for orgmode and the  src blocks?

Uwe Brauer