oik_weight_zone_shipping_check_woo_version() – Check the WooCommerce version against the minimum required level
oik_weight_zone_woocommerce_shipping_methods() – Implement ‘woocommerce_shipping_methods’ filter for oik-weight-zone-shipping
oik_weight_zone_woocommerce_shipping_init() – Implement ‘woocommerce_shipping_init’ to load l10n versions and then initialise weight zone shipping
OIK_Weight_Zone_Shipping::pick_smallest_rate() – Picks the right rate from available rates based on cart weight
OIK_Weight_Zone_Shipping::no_shipping_available() – Implement "woocommerce_cart_no_shipping_available_html"
