Hide field types in order data

If you want to hide certain field types, e.g. calculation fields, from being displayed in order data, use the following snippet:

	<?php
	/**
	* Prevent some field types from being displayed in order data
	*/
	function prefix_hidden_group_types_in_order( $group_types ) {
	$group_types = array( 'calculation' );
	return $group_types;
	}
	add_filter( 'pewc_hidden_group_types_in_order', 'prefix_hidden_group_types_in_order' );