Custom memory creator for each module

[Alphapage]

Hello,

I tried the custom memory creator.
I think it would be great to have a custom memory creator for each module, so we could map memory individually. Because for now, the custom memory creator is the same for every module instantiated.

Thank you in advance if you consider this feature interesting.

[bjorn3]

I think this is covered by bytecodealliance/rfcs#5.