/**
  * @param IOInterface $io
  * @param string $binDir
  * @param string $binCompat
  * @param Filesystem $filesystem
  */
 public function __construct(IOInterface $io, $binDir, $vendorDir, $binCompat, Filesystem $filesystem, PearInstaller $installer)
 {
     parent::__construct($io, $binDir, $binCompat, $filesystem);
     $this->installer = $installer;
     $this->vendorDir = $vendorDir;
 }