This is part of the Fake.Runtime module. LegacyApiHelper Nested types and modules TypeDescription NewApiMutableHelper<'a> Functions and values Function or valueDescription ofRef(r) Signature: r:'?16361 ref -> NewApiMutableHelper<'?16361> Type parameters: '?16361 toGetSet(f) Signature: f:(unit -> NewApiMutableHelper<'?16363>) -> (unit -> '?16363) * ('?16363 -> unit) Type parameters: '?16363