See this and [this|https://github.com/mongodb/mongo-java-driver/blob/b9251622747231e05d6b1736a06fe45e03f642e5/driver-reactive-streams/src/main/com/mongodb/reactivestreams/client/internal/crypt/CommandMarker.java#L70.

It should be:

boolean cryptSharedIsAvailable = cryptSharedLibVersionString != null && !cryptSharedLibVersionString.isEmpty()

Consider also how to add at least unit test coverage since there are currently no tests for this.