code: public void buildPropertiesSummary(XMLNode node, Content memberSummaryTree) {
          MemberSummaryWriter writer =
                  memberSummaryWriters[VisibleMemberMap.PROPERTIES];
          VisibleMemberMap visibleMemberMap =
                  visibleMemberMaps[VisibleMemberMap.PROPERTIES];
          addSummary(writer, visibleMemberMap, true, memberSummaryTree);
      }
docs: Build the summary for the fields.