Coerces the passed in linq expression to setexpression. If the passed in expression is a parameter, it will convert it to a setreference expression otherwise it will try to cast it to a setexpression. If this can't be done, in the situation where tocoerce isn't a setexpression, null is returned.

public static SetExpression CoerceToSet(
	Expression toCoerce,
	MappingTracker trackedMappings,
	bool throwOnFailure
)

Public Shared Function CoerceToSet ( 
	toCoerce As Expression,
	trackedMappings As MappingTracker,
	throwOnFailure As Boolean
) As SetExpression