public com.google.protobuf.ByteString getValueBytes() {
        java.lang.Object ref = value_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
          value_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
<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-v1p4beta1/src/main/java/com/google/cloud/vision/v1p4beta1/Product.java