pub type CommunityId = u32;Expand description
Opaque integer identifier of a community in a CommunityAssignment.
Assigned canonically: the community containing the node with the
smallest NodeId gets CommunityId(0), the next smallest
previously-unseen node gets CommunityId(1), and so on. This
canonicalisation is what makes content_cid stable under
permutations of input edge order.