[Plugin: Widget Logic] Using with TTFtitles

I’m interested in setting up TTFtitles to work with renaming my widget titles, but I’m confused about where I need to makes edits in my code to accommodate this:

I added this filter in order to render all widget titles with the excellent [ttftext plugin](https://templature.com/2007/10/18/ttftitles-wordpress-plugin/) like this:

function ttftext_widget_title($content='', $widget_id='')
{	preg_match("/<h2[^>]*>([^<]+)/",$content, $matches))
	$heading=$matches[1];
	$insert_img=the_ttftext( $heading, false );
	$content=preg_replace("/(<h2[^>]*>)[^<]+/","$1$insert_img",$content,1);
	return $content;
}

Where would I need to put this code? What changes do I need to make to it? And what additional code (and core page edits) would I need to make?