A ContainerLock represents a qualifier that is to be used when
locking a container through a ContainerHandle.
MT - Immutable
See Also:ContainerHandle See Also:LockingPolicy
Get an integer representation of the type of the lock. This method is guaranteed
to return an integer >= 0 and < C_NUMBER. No correlation between the value
and one of the static variables (CIS etc.) is guaranteed, except that
the values returned do not change.