21.1.1.3.18. LifespanQosPolicy¶ class fastdds.LifespanQosPolicy¶ Specifies the maximum duration of validity of the data written by the DataWriter. Notes: Mutable Qos Policy clear()¶ Clears the QosPolicy object property duration¶ Period of validity. By default, dds::c_TimeInfinite. property thisown¶ The membership flag