frame.js state.graphStack is not used.

[davidlehn]

lib/frame.js tracks graphs with state.graphStack but it doesn't look like they are used.

@gkellogg Was there a plan for this? Pending tests that would need it? Maybe something that didn't make it over from ruby?

It might be a good point for a debugging hook.

[gkellogg]

Perhaps we should add tests that would flesh out the need for this.

Intuitively, if pushing onto a shared stack when processing a named graph, you would need to revert to the previous state after processing, but a test that could fail would be useful. Or, if we can't come up with one, perhaps it's not really necessary after all.

[gkellogg]

See w3c/json-ld-framing#97, I now believe graphStack serves no purpose.

[davidlehn]

Closed in #377.