lib/Twig/lib/Twig/Error.php
public function getSourceContext()
    {
        return $this->filename ? new Twig_Source($this->sourceCode, $this->filename, $this->sourcePath) : null;
    }
public function getSourceContext()
    {
        return $this->filename ? new Twig_Source($this->sourceCode, $this->filename, $this->sourcePath) : null;
    }
Gets the source context of the Twig template where the error occurred.

@return Twig_Source|null