private com.google.protobuf.SingleFieldBuilderV3<
              com.google.cloud.visionai.v1.RequestMetadata,
              com.google.cloud.visionai.v1.RequestMetadata.Builder,
              com.google.cloud.visionai.v1.RequestMetadataOrBuilder>
          getMetadataFieldBuilder() {
        if (metadataBuilder_ == null) {
          metadataBuilder_ =
              new com.google.protobuf.SingleFieldBuilderV3<
                  com.google.cloud.visionai.v1.RequestMetadata,
                  com.google.cloud.visionai.v1.RequestMetadata.Builder,
                  com.google.cloud.visionai.v1.RequestMetadataOrBuilder>(
                  getMetadata(), getParentForChildren(), isClean());
          metadata_ = null;
        }
        return metadataBuilder_;
      }
<pre>
The configurations that specify where packets are retrieved.
</pre>

<code>.google.cloud.visionai.v1.RequestMetadata metadata = 1;</code>
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ReceivePacketsRequest.java