pub trait StatsProvider {
// Required methods
fn get(&self, stat: Stat) -> Option<Precision<ScalarValue>>;
fn len(&self) -> usize;
// Provided method
fn is_empty(&self) -> bool { ... }
}
pub trait StatsProvider {
// Required methods
fn get(&self, stat: Stat) -> Option<Precision<ScalarValue>>;
fn len(&self) -> usize;
// Provided method
fn is_empty(&self) -> bool { ... }
}