code: public static <T> ListDataKey<T> create(String name, Class<T> dataClass) {
          return create(name, dataClass, true);
      }
docs: creates a list data key with the given name and type. Null types are allowed.
  
  @param <T> the type of the value
  @param name the name of the key that is stored in the xdata file
  @param dataClass the class of the type
  @return