interface Deno.FfiPermissionDescriptor
The permission descriptor for the `allow-ffi` and `deny-ffi` permissions, which controls
access to loading _foreign_ code and interfacing with it via the
[Foreign Function Interface API](https://docs.deno.com/runtime/manual/runtime/ffi_api)
available in Deno. The option `path` allows scoping the permission to a
specific path on the host.