public java.util.List<com.google.cloud.workstations.v1beta.WorkstationConfig.EphemeralDirectory>
        getEphemeralDirectoriesList() {
      if (ephemeralDirectoriesBuilder_ == null) {
        return java.util.Collections.unmodifiableList(ephemeralDirectories_);
      } else {
        return ephemeralDirectoriesBuilder_.getMessageList();
      }
    }
<pre>
Optional. Ephemeral directories which won't persist across workstation
sessions.
</pre>

<code>
repeated .google.cloud.workstations.v1beta.WorkstationConfig.EphemeralDirectory ephemeral_directories = 22 [(.google.api.field_behavior) = OPTIONAL];
</code>
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java