getOption in add_filter()

[lucasmg-dev]

I want to get the value of an option in the filter template in my plugin, but I get the following error: "Titan Framework Error: Wrong usage of getOption, this should be called inside a hook or from within a theme file."

    <?php

    $titan = TitanFramework::getInstance( PLUGIN_NAME );

   // Create panels, options, etc. 

    function load_mobile_theme($theme) {
        global $titan;
        [...]
        return $titan->getOption('mobile_theme');
    }

    add_filter('template', 'load_mobile_theme');
    add_filter('option_template', 'load_mobile_theme');
    add_filter('option_stylesheet', 'load_mobile_theme');