code: public static <K, V> Map<K, V> removeNulls(Map<K, V> map) {
          Map<K, V> result = new LinkedHashMap<>();
          map.forEach((k, v) -> {
              if (v != null) {
                  result.put(k, v);
              }
          });
          return result;
      }
docs: Remove null values from map.
  
  @param map
  @return
  @since 0.9.0