s3 method that lets statnet's as.network generic
dispatch on netify objects. equivalent to netify_to_statnet(x, ...).
registered against the network namespace in .onload, so the
dispatch works regardless of whether network is attached before or
after netify.
Arguments
- x
a netify object.
- ...
extra arguments forwarded to
netify_to_statnet(e.g.add_nodal_attribs,add_dyad_attribs).