code: public CmsRelationFilter filterPath(String path) {
  
          CmsRelationFilter filter = (CmsRelationFilter)clone();
          filter.m_path = path;
          return filter;
      }
docs: Returns an extended filter with the given source relation path restriction.<p>
  
  @param path the source relation path to filter
  
  @return an extended filter with the given source relation path restriction