code: public static <T1, T2> BiConsumer<T1, T2> ignore1st(Consumer<T2> consumer, Class<T1> ignored) {
          dbc.precondition(consumer != null, "cannot ignore parameter of a null consumer");
          return (first, second) -> consumer.accept(second);
      }
docs: Adapts an consumer to a binary consumer by ignoring the first parameter.
  
  @param <T1> the adapted consumer first parameter type
  @param <T2> the adapted consumer second parameter type
  @param consumer the consumer to be adapted
  @param ignored the adapted consumer ignored parameter type class
  @return the adapted binary consumer