code: public static <T, K> void notNullOrEmpty(Map<T, K> map, String message) {
  
  		isFalse(map == null || map.size() == 0, message);
  	}
docs: Tests if map is null or empty
  
  @param map     must be have at least one element
  @param message to return in exception
  @param <T>     object type
  @param <K>     value type
  @throws IllegalArgumentException if list == null or list.size() == 0