This just sets a null action for all existing transitions. Previously,
this was in DTMCExplicit, but has been removed from there. This means
it can also be removed from DTMCView.
In fact the implementation is taken from DTMCView, which was cleaner.
Furthermore, the same mechanism is now also used for implementing
getTransitionsAndActionsIterator in DTMCFromMDPMemorylessAdversary.
Move getNumTransitions(int) to Model from DTMC.
There is a default implementation using getSuccessorsIterator(int).
This allows us to provide a default implementation of getNumTransitions() too.
Also move getNumTransitions(PrimitiveIterator.OfInt) to Model from DTMC/NondetModel.
When DOT graphs of a model are exported, their maximum permitted size is
hardcoded to 8 inches wide by 5 inches high, which is too small for the
rendered drawing to be useful (e.g. during debugging) for all but the
simplest of models. Remove the maximum size restriction, allowing tools
to render the drawing with its natural dimensions.
Dave Parker