Null deprecated

Null ^deprecated

class Null extends IsNull

^deprecated

since version 2.7, to be removed in 3.0. Use IsNull instead.

DEFAULT_GROUP	The name of the group given to all constraints with no explicit group.
CLASS_CONSTRAINT	Marks a constraint that can be put onto classes.
PROPERTY_CONSTRAINT	Marks a constraint that can be put onto properties.
NOT_NULL_ERROR