### Question:
CypherUtil { static Map<String, Object> flattenMap(Multimap<String, Object> paramMap) { Map<String, Object> flatMap = new HashMap<>(); for (Entry<String, Collection<Object>> entry : paramMap.asMap().entrySet()) { flatMap.put(entry.getKey(), getFirst(entry.getValue(), null)); } return flatMap; } @Inject  CypherUtil(GraphDatabaseService graphDb, CurieUtil curieUtil); Result execute(String query, Multimap<String, Object> params, long timeout, TimeUnit unit); Result execute(String query, long timeout, TimeUnit unit); Result execute(String query, Multimap<String, Object> params); Result execute(String query); Set<RelationshipType> getEntailedRelationshipTypes(Collection<String> parents); @Deprecated String resolveStartQuery(String cypher); String resolveNodeIris(String cypher); String resolveRelationships(String cypher); Map<String, String> getCurieMap();  }### Answer:
@Test public void flattenMap() { Multimap<String, Object> multiMap = HashMultimap.create(); multiMap.put("foo", "bar"); multiMap.put("foo", "baz"); assertThat(CypherUtil.flattenMap(multiMap), IsMapContaining.hasKey("foo")); }