code: public final Properties toProperties() {
          final Properties retVal = new Properties();
          for (int i = 0; i < props.size(); i++) {
              final Property prop = props.get(i);
              if (!prop.isDeleted()) {
                  retVal.put(prop.getKey(), prop.getValue());
              }
          }
          return retVal;
      }
docs: Returns a copy of all properties.
  
  @return All key/values without deleted ones.