pub trait DataMutAPI: DataAPI {
// Required method
fn raw_mut(&mut self) -> &mut Self::Data;
// Provided method
fn as_mut(&mut self) -> DataMut<'_, Self::Data> { ... }
}
pub trait DataMutAPI: DataAPI {
// Required method
fn raw_mut(&mut self) -> &mut Self::Data;
// Provided method
fn as_mut(&mut self) -> DataMut<'_, Self::Data> { ... }
}