code: public void clearFolders(boolean searchChanged) {
  
          Set<String> selectedFolders = m_searchObject.getFolders();
          if (searchChanged) {
              m_searchObjectChanged = true;
          }
          m_handler.onClearFolders(selectedFolders);
          m_searchObject.clearFolders();
          updateResultsTab(false);
          ValueChangeEvent.fire(this, m_searchObject);
      }
docs: Removes all selected folders from the search object.<p>
  
  @param searchChanged if true, marks the search parameters as changed