I would like to add a class to the existing woocommerce product widget.
The file '/includes/widgets/class-wc-widget-products.php'
has the following filter.
echo apply_filters( 'woocommerce_before_widget_product_list', '<ul class="product_list_widget">' );
Is there a method that I can edit the html <ul class="product_list_widget">
in that filter within my theme?