...number of individuals who are named parties to the suit. But there had been one exception. Where persons so numerous as to make it impracticable to bring them all before the court had a common interest (for example a joint interest in some property), which could be adequately...

...general interest of many persons or when the parties are very numerous and it may be impracticable to bring them all before the court, one or more may sue or defend for the benefit of the whole."1' The courts interpret this to require that "(1) [t]he named parties must have...