This utility function allows specification of certain
netsim() controls to vary by network. The
netsim() control arguments currently supporting
multilayer specifications are nwstats.formula,
set.control.ergm, set.control.tergm, and
tergmLite.track.duration.
See also
netsim() for passing a list of netest() fits, one per layer.
The Multi-Layer Networks
chapter of the Network Modeling for Epidemics course materials works
through a two-layer model in full.