Supported list types
Number list
This function returns a number list with all numbers in argument l or in argument m without duplicated numbers.
union(number list l, number list m) #Output: Number list
Text list
This function returns a text list with all texts in argument l or in argument m without duplicated texts.
union(text list l, text list m) #Output: Text list
Issue list
This function returns an issue list with all issues in argument l or in argument m without duplicated issues.
union(issue list l, issue list m) #Output: Issue list