public function container($contents, $classes = null, $id = null) {
        return $this->container_start($classes, $id) . $contents . $this->container_end();
    }
public function container($contents, $classes = null, $id = null) {
        return $this->container_start($classes, $id) . $contents . $this->container_end();
    }
public function container ( $ contents , $ classes = null , $ id = null ) { return $ this -> container_start ( $ classes , $ id ) . $ contents . $ this -> container_end ( ) ; }
Outputs a container.

@param string $contents The contents of the box
@param string $classes A space-separated list of CSS classes
@param string $id An optional ID
@return string the HTML to output.
Outputs a container .