public static <T, T1> T1 first(Map<T, T1> map, JFuncTT<T, Boolean> func) {
   try {
     for (Map.Entry<T, T1> el : map.entrySet()) if (func.invoke(el.getKey())) return el.getValue();
   } catch (Exception ignore) {
   }
   return null;
 }
 public static <T, T1> Map<T, T1> where(Map<T, T1> map, JFuncTT<Map.Entry<T, T1>, Boolean> func) {
   try {
     Map<T, T1> result = new HashMap<>();
     for (Map.Entry<T, T1> el : map.entrySet())
       if (func.invoke(el)) result.put(el.getKey(), el.getValue());
     return result;
   } catch (Exception ignore) {
     return new HashMap<>();
   }
 }
 public static <T, T1, T2> Map<T, T2> select(Map<T, T1> map, JFuncTT<T1, T2> func) {
   try {
     Map<T, T2> result = new HashMap<>();
     for (Map.Entry<T, T1> el : map.entrySet())
       result.put(el.getKey(), func.invoke(el.getValue()));
     return result;
   } catch (Exception ignore) {
     return new HashMap<>();
   }
 }
 public static <T, T1, T2> Collection<T2> selectMap(
     Map<T, T1> map, JFuncTT<Map.Entry<T, T1>, T2> func) {
   try {
     List<T2> result = new ArrayList<>();
     for (Map.Entry<T, T1> el : map.entrySet()) result.add(func.invoke(el));
     return result;
   } catch (Exception ignore) {
     return new ArrayList<>();
   }
 }
 public static <T, T1> void foreach(Map<T, T1> map, JActionT<Map.Entry<T, T1>> action) {
   try {
     for (Map.Entry<T, T1> entry : map.entrySet()) action.invoke(entry);
   } catch (Exception ignore) {
   }
 }
 public static <T, T1> T1 first(Map<T, T1> map) {
   for (Map.Entry<T, T1> el : map.entrySet()) return el.getValue();
   return null;
 }