apoc.map.groupByMulti Function apoc.map.groupByMulti([maps/nodes/relationships],'key') yield value - creates a map of the list keyed by the given property, with list values Signature apoc.map.groupByMulti(values :: LIST? OF ANY?, key :: STRING?) :: (MAP?) Input parameters Name Type Default values LIST? OF ANY? null key STRING? null More documentation of apoc.map.groupByMulti