docs: public static <K, V> Map.Entry<K, V> find(Map<K, V> self, @ClosureParams(MapEntryOrKeyValue.class) Closure<?> closure) {
          BooleanClosureWrapper bcw = new BooleanClosureWrapper(closure);
          for (Map.Entry<K, V> entry : self.entrySet()) {
              if (bcw.callForMap(entry)) {
                  return entry;
              }
          }
          return null;
      }