public function useReadline()
    {
        return isset($this->useReadline) ? ($this->hasReadline && $this->useReadline) : $this->hasReadline;
    }
public function useReadline()
    {
        return isset($this->useReadline) ? ($this->hasReadline && $this->useReadline) : $this->hasReadline;
    }
public function useReadline ( ) { return isset ( $ this -> useReadline ) ? ( $ this -> hasReadline && $ this -> useReadline ) : $ this -> hasReadline ; }
Check whether to use Readline.

If `setUseReadline` as been set to true, but Readline is not actually
available, this will return false.

@return bool True if the current Shell should use Readline
Check whether to use Readline .