Use of @Transient in gettimeofday example

[cleishm]

https://github.com/jnr/jnr-ffi-examples/blob/master/gettimeofday/src/main/java/gettimeofday/Gettimeofday.java#L22

I'm not sure how this is transient?

Indicates that the parameter is transient. This means it can be backed by a temporarily allocated native memory block, and after the method call, the native memory can be freed again.

Yet the parameter is an @Out parameter, so it must be read after the method call returns. What am I misunderstanding?