Anyone know what this hscript expression does?

I just tried exhelp opstreamname and the help is “string opstreamname (string)”

Sorry, I seem to have missed documenting that…

= opstreamname =

“”“Computes the active stream of a node.”“”

In POPs there is the idea of an active stream. This is the set of particles a
micro solver should work on by virtue of its inputs. The opstreamname
expression computes the ad hoc point group for the nodes active stream.

If the node has only a single solid input that leads to a generator,
this thus will evaluate to the `streamname` parameter of that generator.
But, in the presence of merge nodes, it may produce a list of groups
that form the active stream.

@usage
`string opstreamname(<<nodepath>>)`

Thanks