protected function installCssFramework( InputInterface $input, OutputInterface $output, $css_framework ) {
		$command = $this->getApplication()->find( 'install:css-framework' );

		$this->runInstallCommand( $css_framework, $command, new ArrayInput( [
			'command' => 'install:css-framework',
			'css-framework' => $css_framework,
		] ), $output );
	}