public Builder mergeStateTime(com.google.protobuf.Timestamp value) {
      if (stateTimeBuilder_ == null) {
        if (((bitField0_ & 0x00000800) != 0)
            && stateTime_ != null
            && stateTime_ != com.google.protobuf.Timestamp.getDefaultInstance()) {
          getStateTimeBuilder().mergeFrom(value);
        } else {
          stateTime_ = value;
        }
      } else {
        stateTimeBuilder_.mergeFrom(value);
      }
      if (stateTime_ != null) {
        bitField0_ |= 0x00000800;
        onChanged();
      }
      return this;
    }
<pre>
Output only. The last time the migrating VM state was updated.
</pre>

<code>
.google.protobuf.Timestamp state_time = 22 [(.google.api.field_behavior) = OUTPUT_ONLY];
</code>
java-vmmigration/proto-google-cloud-vmmigration-v1/src/main/java/com/google/cloud/vmmigration/v1/MigratingVm.java