Looks like you spec some parts of the node layout & maybe types, and it fits that spec against your data. So no support for fully custom layouts / fitting methods, but you can parameterize with for instance more or less layers or number of hidden units.

Parameterizing & fitting these networks (both in having a good underlying representation, and deciding which actual parameterization to use) gets tricky & requires some domain knowledge when you start doing things like conditional or continuous RBMs.