code: private Map<String,Boolean> getFilters()
      {
          Map<String,Boolean> filters= new HashMap<String, Boolean>(2);
          //Site filter
          filters.put(SITES_FILTER, this.sites!=null && this.sites.size() > 0);
          //Properties filter
          filters.put(PROPERTIES_FILTER, this.properties!=null && this.properties.size() > 0);
          
          return filters;
      }
docs: Get existing filters
  @return