Trait Entity
charts
pub trait Entity { fn free(&mut self); fn save(&self); }
A chart entity such as a point, a bar, a pie…
fn free(&mut self)
fn save(&self)
impl<D> Entity for BarEntity<D>
impl<D> Entity for GaugeEntity<D>
impl<D> Entity for LinePoint<D>
impl<D> Entity for PieEntity<D>
impl<D> Entity for PolarPoint<D>