Returns a container for testing controls within the repeater's SeparatorTemplate. The 'separatorNum' is the separator to look for. separatorNum zero is the first separator (between the first and second items); separatorNum one is the second separator (between the second and third items); etc. This method will NOT check to see if the repeater is visible or if it has a SeparatorTemplate. Instead, you'll get a NotVisibleException when you attempt to use the tester instantiated with the result of this method.
A container tester for the separator