private function replaceCurrentVersionbyNewVersion()
    {
        $this->fs->copy($this->newInstallerFile, $this->currentInstallerFile, true);

        return $this;
    }
private function replaceCurrentVersionbyNewVersion()
    {
        $this->fs->copy($this->newInstallerFile, $this->currentInstallerFile, true);

        return $this;
    }
private function replaceCurrentVersionbyNewVersion ( ) { $ this -> fs -> copy ( $ this -> newInstallerFile , $ this -> currentInstallerFile , true ) ; return $ this ; }
Replaces the currenct version of the Symfony installer with the new one.

@return $this
Replaces the currenct version of the Symfony installer with the new one .