@java.lang.Override
    public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io.IOException {
      if (!assetContentData_.isEmpty()) {
        output.writeBytes(1, assetContentData_);
      }
      getUnknownFields().writeTo(output);
    }
<code>bytes asset_content_data = 1;</code>

@return The assetContentData.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/AssetSource.java