code: public void setSearchRoots(String[] searchRoots) {
  
          List<String> l = new ArrayList<String>(Arrays.asList(searchRoots));
          m_parameters.setRoots(l);
          resetLastResult();
      }
docs: Sets the search root list.<p>
  
  Only resources that are sub-resources of one of the search roots
  are included in the search result.<p>
  
  The search roots set here are used <i>in addition to</i> the current site root
  of the user performing the search.<p>
  
  By default, the search roots contain only one entry with an empty string.<p>
  
  @param searchRoots the search roots to set