This class is for parameters that may expand to multiple values. Such
is the case for parameters specified in the 'IN' clause of a query.
For example, a query may have the following form:
SELECT * FROM Products
WHERE ProductID IN (:pids)
The parameter 'pids' may have one or more values.
Implementation Notes:
This interface implements the IQueryInParam interface and inherits
the 'getValue' and 'setValue' methods. These methods should be
implemented to set and retrieve the first value only. Do not use
these methods to set and retrieve the entire vector, instead use
the 'getValues' and 'setValues' methods from this interface.