function discovery_breadcrumbs not overridable

Please, make the function discovery_breadcrumbs overridable.
I want in my child theme override the function. I just have made it myself, but in future theme updates the change is lost.

Just wrap the function with an if.
Like that:

if ( ! function_exists( 'discovery_breadcrumbs' ) ) :
function discovery_breadcrumbs() {
 	//...
	}
} // end discovery_breadcrumbs()
endif;