before_woocommerce_add_payment_method action-hook . WC 1.0

Usage

add_action( 'before_woocommerce_add_payment_method', 'action_function_name_3776' );
function action_function_name_3776(){
	// action...
}

Where the hook is called

do_action( 'before_woocommerce_add_payment_method' );

Where in WP core the hook is used WooCommerce