This annotation MUST be used to mark Integration FLow validator classes. Only the validator classes which are
marked with this annotation will be picked up by the Validation Processor. Any class that is annotated with this
should adhere to the following guidelines.
- The element must be a class type element
- The class must be public
- The class should not be an abstract class
- The class or at least one of its super classes must implement
XFlowValidator
interface.