Is canSee() in the spec? Looks useful, but I haven't seen it before (heh).
No, no it is not in the spec, as of February 15th, 2016:
Update: I think Peter Hunt is talking about Facebook's internal server-side implementation of GraphQL. That's the only way his comments make any sense given what's publicly available.
> For each node type and edge type in the graph, you provide a required canSee() function which controls its visibility.
> It doesn't belong in the spec
_kek_
Am I on candid camera?