@java.lang.Override
  public int getSerializedSize() {
    int size = memoizedSize;
    if (size != -1) return size;

    size = 0;
    if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(inputUri_)) {
      size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, inputUri_);
    }
    size += getUnknownFields().getSerializedSize();
    memoizedSize = size;
    return size;
  }
<pre>
Required. Source data URI. For example, `gs://my_bucket/my_object`.
</pre>

<code>string input_uri = 1 [(.google.api.field_behavior) = REQUIRED];</code>

@return The bytes for inputUri.
java-translate/proto-google-cloud-translate-v3/src/main/java/com/google/cloud/translate/v3/GcsInputSource.java