OperatorValues type
Valid operators are In, NotIn, Exists and DoesNotExist.
KnownOperatorValues can be used interchangeably with OperatorValues,
this enum contains the known values that the service supports.
Known values supported by the service
In: In operator.
NotIn: NotIn operator.
Exists: Exists operator.
DoesNotExist: DoesNotExist operator.
type OperatorValues = string