[ADMB Users] Poisson GLMM example

[dave fournier]

If you search the source code for ADMB you can find where the function 
gets called.
The technique uses virtual functions so that the base class can call a 
function
which it knows nothing about at the time its code is compiled.

As for the variance what can be done is to produce normals with the
desired correlation and then multiply them by the standard deviation
when they are used. Maybe that is what is done here.