public Builder mergeSeriesMetadata(com.google.cloud.visionai.v1.SeriesMetadata value) {
      if (seriesMetadataBuilder_ == null) {
        if (((bitField0_ & 0x00000010) != 0)
            && seriesMetadata_ != null
            && seriesMetadata_
                != com.google.cloud.visionai.v1.SeriesMetadata.getDefaultInstance()) {
          getSeriesMetadataBuilder().mergeFrom(value);
        } else {
          seriesMetadata_ = value;
        }
      } else {
        seriesMetadataBuilder_.mergeFrom(value);
      }
      if (seriesMetadata_ != null) {
        bitField0_ |= 0x00000010;
        onChanged();
      }
      return this;
    }
<pre>
Input only. Immutable. Metadata that the server needs to know where to
write the packets to. It's only required for the first packet.
</pre>

<code>
.google.cloud.visionai.v1.SeriesMetadata series_metadata = 5 [(.google.api.field_behavior) = INPUT_ONLY, (.google.api.field_behavior) = IMMUTABLE];
</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/PacketHeader.java