+		$fields[] = sprintf( __( 'Order Item #%d: Static Field', 'woo_ce' ), $i );

+function custom_woo_ce_order_fields( $fields ) {

+

+    $fields[] = array(

+		'name' => 'order_items_static',

+		'label' => __( 'Order Items: Static Field', 'woo_ce' ),

+		'hover' => __( 'Custom Field within functions.php', 'woo_ce' )

+	);

+	return $fields;

+

+}

+add_filter( 'woo_ce_order_fields', 'custom_woo_ce_order_fields' );

+

+function custom_woo_ce_extend_order_items_unique_columns( $fields = array(), $i = 0, $original_columns = array() ) {

+

+	if( isset( $original_columns[sprintf( 'order_item_%d_static', $i )] ) )

+		$fields[] = sprintf( __( 'Order Item #%d: Static', 'woo_ce' ), $i );

+	return $fields;

+

+}

+add_filter( 'woo_ce_unique_order_item_columns', 'custom_woo_ce_extend_order_items_unique_columns', 10, 3 );

+

+function custom_woo_ce_extend_order_items_unique( $order, $i = 0, $order_item = array() ) {

+

+	$order->{sprintf( 'order_item_%d_static', $i )} = 'Static value';

+	return $order;

+

+}

+add_filter( 'woo_ce_order_items_unique', 'custom_woo_ce_extend_order_items_unique', 10, 3 );

+

+function custom_woo_ce_unique_order_item_fields_on( $fields = array(), $i = 0 ) {

+

+	$fields[sprintf( 'order_item_%d_static', $i )] = 'on';

+	return $fields;

+

+}

+add_filter( 'woo_ce_add_unique_order_item_fields_on', 'custom_woo_ce_unique_order_item_fields_on', 10, 2 );

+

+function custom_woo_ce_extend_order_items_unique_fields_exclusion( $excluded_fields = array(), $fields = '' ) {

+

+	$excluded_fields[] = 'order_items_static';

+	return $excluded_fields;

+

+}

+add_filter( 'woo_ce_add_unique_order_item_fields_exclusion', 'custom_woo_ce_extend_order_items_unique_fields_exclusion', 10, 2 );