original_string: protected function get_expand_course_cache() {
          if ($this->cacheexpandcourse === null) {
              $this->cacheexpandcourse = cache::make('core', 'navigation_expandcourse');
          }
          return $this->cacheexpandcourse;
      }
code: protected function get_expand_course_cache() {
          if ($this->cacheexpandcourse === null) {
              $this->cacheexpandcourse = cache::make('core', 'navigation_expandcourse');
          }
          return $this->cacheexpandcourse;
      }
code_tokens: protected function get_expand_course_cache ( ) { if ( $ this -> cacheexpandcourse === null ) { $ this -> cacheexpandcourse = cache :: make ( 'core' , 'navigation_expandcourse' ) ; } return $ this -> cacheexpandcourse ; }
docstring: Returns a cache instance to use for the expand course cache.
  @return cache_session
docstring_tokens: Returns a cache instance to use for the expand course cache .