Java class to represent the PreEmptionVulnerability enumerated type.
Documentation from the relevant specification:
The Pre-emption-Vulnerability AVP (AVP code 1048) is of type Enumerated. If it is provided within the QoS- Information AVP, the AVP defines whether a service data flow can lose the resources assigned to it in order to admit a service data flow with higher priority level. If it is provided within the Default-EPS-Bearer-QoS AVP, the AVP defines whether the default bearer can lose the resources assigned to it in order to admit a pre-emption capable bearer with a higher priority level. The following values are defined: