Actor1.isValid() returns bool

Check if an actor variable is valid. Most commonly used after GetPerson(), GetCompanion() or GetSpecific()

EXAMPLE:
    John = getSpecific(Colleague)
    If John.isValid()
        "I have at least one colleague"
    Else
        John = generatePerson()
        John.addColleague()
        "I met a new colleague, <John.name>"
    Endif