code: public String toLineDisp() { // basically format is same as requested mail count
          final Map<String, Integer> resolvedMap = facadeCountMap != null ? facadeCountMap : Collections.emptyMap();
          final Integer total = resolvedMap.values().stream().collect(Collectors.summingInt(vl -> vl));
          final StringBuilder sb = new StringBuilder();
          sb.append("{total=").append(total);
          resolvedMap.forEach((facadeName, count) -> {
              sb.append(", ").append(facadeName).append("=").append(count);
          });
          sb.append("}");
          return sb.toString();
      }
docs: =======