public function get_regions() {
        if (is_null($this->defaultregion)) {
            $this->page->initialise_theme_and_output();
        }
        return array_keys($this->regions);
    }
public function get_regions() {
        if (is_null($this->defaultregion)) {
            $this->page->initialise_theme_and_output();
        }
        return array_keys($this->regions);
    }
public function get_regions ( ) { if ( is_null ( $ this -> defaultregion ) ) { $ this -> page -> initialise_theme_and_output ( ) ; } return array_keys ( $ this -> regions ) ; }
Get an array of all region names on this page where a block may appear

@return array the internal names of the regions on this page where block may appear.
Get an array of all region names on this page where a block may appear