Method preferences

/**
 * Writes a configuration button and invokes a cancel operation (eg a checkin).
 *
 * @param   string   $component  The name of the component, eg, com_content.
 * @param   integer  $height     The height of the popup. [UNUSED]
 * @param   integer  $width      The width of the popup. [UNUSED]
 * @param   string   $alt        The name of the button.
 * @param   string   $path       An alternative path for the configuration xml relative to JPATH_SITE.
 *
 * @return  void
 *
 * @since   1.5
 */
public static function preferences($component, $height = 550, $width = 875, $alt = 'JTOOLBAR_OPTIONS', $path = '')
{
    $component = urlencode($component);
    $path = urlencode($path);
    $bar = Toolbar::getInstance('toolbar');
    $uri = (string) Uri::getInstance();
    $return = urlencode(base64_encode($uri));
    // Add a button linking to config for component.
    $bar->appendButton('Link', 'options', $alt, 'index.php?option=com_config&view=component&component=' . $component . '&path=' . $path . '&return=' . $return);
}