In the release notes for Sugar 11; the function isInList has been updated to work with mulitselect fields; Is there an examples of how to properly make this call?

Question

In the release notes for Sugar 11, https://support.sugarcrm.com/Knowledge_Base/Installation_Upgrade/What_to_Expect_When_Upgrading_to_11.0/ . It states

Sugar Logic 
 Passing a mulitselect field as a second parameter in the isInList() formula does not work. 
 Admin users can now pass a mulitselect field as a second parameter in the isInList() formula.

What is the proper way to use this update? 
 I'm trying to show a value if ABC or DEF is selected in the multiselct field 
 isInList(createList("ABC", "DEF"), $multiselectfield) 
 or 
 or(isInList("ABC", $multiselectfield), isInList("DEF", $multiselectfield) 
 
 Documentation has not been updated for this chanage

Jeff Bickart · Answer

Jeff Bickart This is built to support the second formula of yours(I also tested to make sure). isInList(needle, haystack); Needle being the value/string you're searching for in the haystack/the multiselectfield. 
 For example, if we have a multiselect field $multi_field with values A, B, C selected:

isInList(A, $multi_field) = true

isInList(B, $multi_field) = true

isInList(X, $multi_field) = false