Use `#flat_map` instead of map/flatten.  Thanks @avdi!
Use `#flat_map` instead of map/flatten.  Thanks @avdi!

neo4jrb/neo4j-core,subvertallchris/neo4j-core,subvertallchris/neo4j-core,vpacher/neo4j-core,vpacher/neo4j-core,neo4jrb/neo4j-core