usecrate::value_error::ValueResult;/// Internal trait used to set a single value in `MultiValues`.
////// This trait backs `MultiValues::set<S>()`; downstream code should call the
/// inherent method instead of implementing or naming this trait directly.
#[doc(hidden)]pubtraitMultiValuesSingleSetter<T> {/// Replaces the stored values with one `value`.
////// # Returns
////// Returns `Ok(())` when the value can be stored, or a `ValueError`
/// describing why the update failed.
fnset_single_value(&mutself, value: T)->ValueResult<()>;}