code: public FilterBuilder<T> addWithAnd(final Filter<T> filter) {
      filterInstance = ComposableFilter.and(filterInstance, filter);
      return this;
    }
docs: Adds the specified Filter to the composition of Filters joined using the AND operator.
  
  @param filter the Filter to add to the composition joined using the AND operator.
  @return this FilterBuilder instance.
  @see org.cp.elements.lang.Filter