How to write the groovy script for the Line type selection in sales order (Order management)

Summary:

Requirement - Order type = CH Return SO and Line type = Return for credit and return the item

Content (required):

In the below script, when user select Return for credit and return the item line type then also it will showing the Warning/Error.

Version (include the version you are using, if applicable):

Code Snippet (add any code snippets that support your topic, if applicable):

import oracle.apps.scm.doo.common.extensions.ValidationException;

import oracle.apps.scm.doo.common.extensions.Message;

String messageText = "Please select Return Type as Return for credit and return the item ";

String orderTypeCode = header.getAttribute("TransactionTypeCode");