private void buildPartialOneofs(
          com.google.cloud.workstations.v1.WorkstationConfig.PersistentDirectory result) {
        result.directoryTypeCase_ = directoryTypeCase_;
        result.directoryType_ = this.directoryType_;
        if (directoryTypeCase_ == 2 && gcePdBuilder_ != null) {
          result.directoryType_ = gcePdBuilder_.build();
        }
      }
<pre>
A directory to persist across workstation sessions.
</pre>

Protobuf type {@code google.cloud.workstations.v1.WorkstationConfig.PersistentDirectory}
java-workstations/proto-google-cloud-workstations-v1/src/main/java/com/google/cloud/workstations/v1/WorkstationConfig.java