### Question:
SemanticUtils { public static List<Map<String, Object>> merge(List<Map<String, Object>> params){ Map<String, Object> map = new HashMap<>(); for(Map<String, Object> p: params){ if(!p.containsKey(KEY_UNNAMED)) map.putAll(p); } return Collections.singletonList(map); }  static String _N(int item); static String _N_LONG(int item); static String _N_DOUBLE(int item); static ChainMap<String, Object> named(String name, Object value); static ChainMap<String, Object> value(Object value); static SemanticFunction valueFn(Object value); static List<Map<String, Object>> identity(List<Map<String, Object>> params); static List<Map<String, Object>> merge(List<Map<String, Object>> params); static List<Map<String, Object>> first(List<Map<String, Object>> params); static List<Map<String, Object>> last(List<Map<String, Object>> params); static SemanticFunction parseSemantics(String semantics); static SemanticFunction parseTemplate(Map<String, Object> template); final static String _IDENTITY; final static String _FIRST; final static String _LAST; final static String _MERGE; final static String _APPEND; final static String KEY_UNNAMED; }### Answer:
@Test void merge(){ List<Map<String, Object>> params = Arrays.asList( named("a", 1), named("b",2), named("c", 3) ); List<Map<String, Object>> merged = Collections.singletonList( new HashMap<String, Object>() {{ put("a", 1); put("b", 2); put("c", 3); }} ); assertEquals(merged, SemanticUtils.merge(params)); }