Bug #57969 for Storable: Storable - Feature-request - alternate freeze/thaw hooks

Pursuant to the bug in Math::BigInt::GMP (https://rt.cpan.org/Public/Bug/Display.html?id=57064), I request a new thaw hook that rather than being passed in an existent dummy-object, we only receive the frozen value, so that we may return a brand new object. I cannot find a way to take the existent Math::BigInt::GMP constructor to create a new object that matches a _particular_ pointer value. Also, it would be nice if we could have an alternate freeze hook that lets us change the type of the object being frozen, so that Math::BigInt::GMP could return a frozen object that is thawed as Math::BigInt (which would perhaps obviate the new thaw hook for this case). it ought not be required that when thawing a Math::BigInt::GMP object that Math::BigInt::GMP must be available.