public function add(AbstractInstaller $installer)
    {
        $installer->setOutput($this->output);
        $this->installers[] = $installer;
    }
public function add(AbstractInstaller $installer)
    {
        $installer->setOutput($this->output);
        $this->installers[] = $installer;
    }
public function add ( AbstractInstaller $ installer ) { $ installer -> setOutput ( $ this -> output ) ; $ this -> installers [ ] = $ installer ; }
Add an installer.

@param AbstractInstaller $installer
Add an installer .