/// Whether a node carries no information and can be omitted when serializing.
pubtraitEffectivelyUnset{fnis_effectively_unset(&self)->bool;}/// Helper function for `#[serde(skip_serializing_if = ...)]` on every field of a
/// partial struct.
pubfnis_effectively_unset<T>(value:&T)->boolwhere
T: EffectivelyUnset,
{
value.is_effectively_unset()}