I'm afraid the type signature is correct. Please refer to the following gist. https://gist.github.com/anonymous/a0046e1ca87662a018f2 https://gist.github.com/an

I'm afraid the type signature is correct. Please refer to the following gist. https://gist.github.com/anonymous/a0046e1ca87662a018f2 https://gist.github.com/anonymous/a0046e1ca87662a018f2