pinocchio/interface: Add sealed trait to Transmute#143
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Problem
Currently, pinocchio interface uses a
Transmutetrait to specify the logic for loading account types. This is anunsafeand internal-only trait, but at the same time, it needs to be public.Solution
Add a sealed trait to prevent external implementations of the
Transmutetrait. This does not add any runtime overhead.cc: @d0nutptr