Add a new social icon with new function

Hello,

i already read this http://kriesi.at/documentation/enfold/custom-social-icons/
And it works very well.

Now i need for this new icon a new function not simply a link.

I want add a snippet

 if (function_exists('example')) {
        example();
    }

What i must paste in functions.php ???
Is this the right way?:

add_filter('avia_social_share_link_arguments', 'avia_social_share_link_newfunction', 10, 1);
if (function_exists('example')) {
        example();
    }

This is what i already have there:

// Register new icon as a theme icon
function avia_add_custom_icon($icons) {
	$icons['Ändere Schriftgröße']	 = array( 'font' =>'fontello', 'icon' => 'uf088');
	return $icons;
	
}
add_filter('avf_default_icons','avia_add_custom_icon', 10, 1);

// Add new icon as an option for social icons
function avia_add_custom_social_icon($icons) {
	$icons['Change Fontsize'] = 'Ändere Schriftgröße';
	return $icons;
}
add_filter('avf_social_icons_options','avia_add_custom_social_icon', 10, 1);