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:'?15941 ref -> NewApiMutableHelper<'?15941> Type parameters: '?15941 toGetSet(f) Signature: f:(unit -> NewApiMutableHelper<'?15943>) -> (unit -> '?15943) * ('?15943 -> unit) Type parameters: '?15943