private com.google.protobuf.SingleFieldBuilderV3<
            com.google.protobuf.Timestamp,
            com.google.protobuf.Timestamp.Builder,
            com.google.protobuf.TimestampOrBuilder>
        getDeleteTimeFieldBuilder() {
      if (deleteTimeBuilder_ == null) {
        deleteTimeBuilder_ =
            new com.google.protobuf.SingleFieldBuilderV3<
                com.google.protobuf.Timestamp,
                com.google.protobuf.Timestamp.Builder,
                com.google.protobuf.TimestampOrBuilder>(
                getDeleteTime(), getParentForChildren(), isClean());
        deleteTime_ = null;
      }
      return deleteTimeBuilder_;
    }
<pre>
Output only. Time when this workstation configuration was soft-deleted.
</pre>

<code>
.google.protobuf.Timestamp delete_time = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-workstations/proto-google-cloud-workstations-v1beta/src/main/java/com/google/cloud/workstations/v1beta/WorkstationConfig.java