private com.google.protobuf.SingleFieldBuilderV3<
              com.google.protobuf.Timestamp,
              com.google.protobuf.Timestamp.Builder,
              com.google.protobuf.TimestampOrBuilder>
          getLastModificationTimeFieldBuilder() {
        if (lastModificationTimeBuilder_ == null) {
          lastModificationTimeBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.protobuf.Timestamp,
                  com.google.protobuf.Timestamp.Builder,
                  com.google.protobuf.TimestampOrBuilder>(
                  getLastModificationTime(), getParentForChildren(), isClean());
          lastModificationTime_ = null;
        }
        return lastModificationTimeBuilder_;
      }
<pre>
Output only. The time that the transfer job was last modified.
</pre>

<code>
.google.protobuf.Timestamp last_modification_time = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-storage-transfer/proto-google-cloud-storage-transfer-v1/src/main/java/com/google/storagetransfer/v1/proto/TransferTypes.java