Function create_sync_derived_rw_signal 

pub fn create_sync_derived_rw_signal<T, O, GF, UF>(
    signal: RwSignal<T, SyncStorage>,
    getter: GF,
    setter: UF,
) -> SyncDerivedRwSignal<T, O, GF, UF>
where
    T: Send + Sync + 'static,
    O: Send + Sync,
    GF: Fn(&T) -> O + Clone + Send + Sync + 'static,
    UF: Fn(&O) -> T + Clone + Send + Sync + 'static,