Supported list types
Number list
This function returns the first element in the number list l, or null
if l is an empty list.
first(number list l) #Output: Number
Text list
This function returns the first element in the text list l, or null
if l is an empty list.
first(string list l) #Output: Text
Issue list
The function returns an issue list with the first element in issue list l, or an empty list if l is an empty list.
first(issue list l) #Output: Issue list