The function returns a TEXT representing the name of the active user playing a project role with the name projectRoleName in the current issue's project, and has the lower number of issues with resolution empty assigned; or ""
if there isn't any user in the project role.
Parameter projectRoleName can be a comma-separated list of project role names, returning the least busy users among the project roles.
leastBusyUserInRole(text projectRoleName) #Output: Text
Equivalent to the previous function but with extra argument projectKey for selecting the project argument projectRoleName refers to.
leastBusyUserInRole(text projectRoleName, text projectKey) #Output: Text
Equivalent to the previous function but with extra argument jqlQuery, used for restricting the issues to be considered to pick the least busy user.
leastBusyUserInRole(text projectRoleName, text projectKey, text jqlQuery) #Output: Text