code: public static <TItem> Bson pushEach(final String fieldName, final List<TItem> values) {
          return new PushUpdate<TItem>(fieldName, values, new PushOptions());
      }
docs: Creates an update that adds each of the given values to the array value of the field with the given name.
  
  @param fieldName the non-null field name
  @param values    the values
  @param <TItem>   the value type
  @return the update
  @mongodb.driver.manual reference/operator/update/push/ $push