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

      size = 0;
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(key_)) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(1, key_);
      }
      if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(value_)) {
        size += com.google.protobuf.GeneratedMessageV3.computeStringSize(2, value_);
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSize = size;
      return size;
    }
<pre>
The value of the label attached to the product. Cannot be empty and
cannot exceed 128 bytes.
</pre>

<code>string value = 2;</code>

@return The bytes for value.
java-vision/proto-google-cloud-vision-v1p3beta1/src/main/java/com/google/cloud/vision/v1p3beta1/Product.java