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Membrane

This is an example of a "permeable membrane" pattern in ocaps.

A permeable membrane wraps an object graph using a dependently typed monad to provide a policy effect. It differs from a "hard membrane" in that wrapping must be done manually and involves co-operation from participants, rather than being provided automatically.

You can read @ref:Confining Capabilities in the guide for more information.

@@snip Membrane.scala { #membrane }