WordPress at a glance
filter is not described

woocommerce_geolocation_ip_lookup_apis filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_geolocation_ip_lookup_apis', 'filter_function_name_4350' );
function filter_function_name_4350( $self::$ip_lookup_apis ){
	// filter...

	return $self::$ip_lookup_apis;
}
$self::$ip_lookup_apis
-

Where the hook is called

WC_Geolocation::get_external_ip_address()
woocommerce_geolocation_ip_lookup_apis
woocommerce/includes/class-wc-geolocation.php 166
$ip_lookup_services      = apply_filters( 'woocommerce_geolocation_ip_lookup_apis', self::$ip_lookup_apis );

Where the hook is used (in WC core)

Usage not found!