/**
* @param array $hash
*/
private function _writeToComposerFile(array $hash)
{
$composerFile = new Composer\Json\JsonFile($this->_installation->getDirRoot() . 'composer.json');
$configCurrent = $composerFile->read();
$this->_filesystemHelper->notify('modify', 'composer.json');
$configMerged = $this->_mergeConfigs($configCurrent, $hash);
$composerFile->write($configMerged);
$this->_installation->reload();
}
