WPSL Load Custom Stylesheet

wpsl-load-custom-style.php

<?php 
        /**
         * Load the required css styles
         *
         * @since 2.0
         * @return void
         */
		    public function add_frontend_styles() {
      
            $min = '';
            $file = get_template_directory() . "/wp-store-locator/style.css";
            if (file_exists($file)) {
                wp_enqueue_style( 'wpsl-styles', get_template_directory_uri() . '/wp-store-locator/style'. $min .'.css', '', WPSL_VERSION_NUM );
            } else {
                wp_enqueue_style( 'wpsl-styles', WPSL_URL . 'css/styles'. $min .'.css', '', WPSL_VERSION_NUM );
            } 
        }