EXTEND FORM formName
EXTEND FORM statement allows you to extend an existing form with additional form blocks.
The name of the form being extended. Composite ID.
formBlock1 ... formBlockN
name = DATA ISTRING (ItemGroup);
itemGroup = DATA ItemGroup (Item);
EXTEND FORM items
PROPERTIES(i) NEWSESSION DELETE // adding a delete button to the form
OBJECTS g = ItemGroup BEFORE i // adding a product group object to the form before the product
PROPERTIES(g) READONLY name
// if the object was added after the object with products, then filtering would go by the group of products,
// and not by products
FILTERS itemGroup(i) == g