public static < K , V > void putSetAll ( Map < K , Set < V > > map , Map < K , Set < V > > other ) { for ( Map . Entry < K , Set < V > > me : other . entrySet ( ) ) { putSetMult ( map , me . getKey ( ) , me . getValue ( ) ) ; } }
Copies all of the mappings from the second map to the first . The value for each key is the union of the first and second maps values for that key .