Function add_to_linker_instance 

pub fn add_to_linker_instance<T, D>(
    inst: &mut LinkerInstance<'_, T>,
    host_getter: fn(&mut T) -> D::Data<'_>,
) -> Result<()>
where
    D: HostWithStore<T>,
    for<'a> D::Data<'a>: Host,
    T: 'static + Send,

Available on crate feature p3 only.