public function process_admin_options() {
		if ( ! $this->instance_id ) {
			return parent::process_admin_options();
		}

		// Check we are processing the correct form for this instance.
		if ( ! isset( $_REQUEST['instance_id'] ) || absint( $_REQUEST['instance_id'] ) !== $this->instance_id ) { // WPCS: input var ok, CSRF ok.
			return false;
		}

		$this->init_instance_settings();

		$post_data = $this->get_post_data();

		foreach ( $this->get_instance_form_fields() as $key => $field ) {
			if ( 'title' !== $this->get_field_type( $field ) ) {
				try {
					$this->instance_settings[ $key ] = $this->get_field_value( $key, $field, $post_data );
				} catch ( Exception $e ) {
					$this->add_error( $e->getMessage() );
				}
			}
		}

		return update_option( $this->get_instance_option_key(), apply_filters( 'woocommerce_shipping_' . $this->id . '_instance_settings_values', $this->instance_settings, $this ), 'yes' );
	}