src/Driver/LibXl.php
public function source($filename = null)
    {
        if ($filename) {
            $this->filename = $filename;

            return $this;
        }

        return $this->filename;
    }
public function source($filename = null)
    {
        if ($filename) {
            $this->filename = $filename;

            return $this;
        }

        return $this->filename;
    }
{@inheritDoc}