tree 9c6037aa85d42525c3181c8d5fee20727b826ff6
parent ca87fdb979a849b9fe2b4fa592d4eb2e38a2ec0a
author bluss <bluss@users.noreply.github.com> 1505647694 +0200
committer bluss <bluss@users.noreply.github.com> 1505653303 +0200

FEAT: Add StableGraph::filter_map

Add helper methods to add new "tombstone" nodes/edges, so that we
reproduce the original node / edge indices exactly. We put the regular
free lists to side for this and keep it separately, so that add
node/edge don't reuse them during the mapping.