public function main($plugin = null)
{
$this->bootstrap = ROOT . DIRECTORY_SEPARATOR . 'config' . DIRECTORY_SEPARATOR . 'bootstrap.php';
if (empty($plugin)) {
$this->err('You must provide a plugin name in CamelCase format.');
$this->err('To unload an "Example" plugin, run `cake plugin unload Example`.');
return false;
}
return (bool) $this->_modifyBootstrap($plugin);
}