public Builder clearEphemeralDirectories() {
      if (ephemeralDirectoriesBuilder_ == null) {
        ephemeralDirectories_ = java.util.Collections.emptyList();
        bitField0_ = (bitField0_ & ~0x00004000);
        onChanged();
      } else {
        ephemeralDirectoriesBuilder_.clear();
      }
      return this;
    }
<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