Javadoc
Define whether more than one constraint on a return value may be marked for cascading validation are allowed.
The default value is
false, i.e. do not allow.
"One must not mark a method return value for cascaded validation more than once in a line of a class hierarchy.
In other words, overriding methods on sub types (be it sub classes/interfaces or interface implementations)
cannot mark the return value for cascaded validation if the return value has already been marked on the
overridden method of the super type or interface."