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:'?16385 ref -> NewApiMutableHelper<'?16385> Type parameters: '?16385 toGetSet(f) Signature: f:(unit -> NewApiMutableHelper<'?16387>) -> (unit -> '?16387) * ('?16387 -> unit) Type parameters: '?16387