pub trait ExDerefMut: Deref + PointeeSized {
type ExternalTraitSpecificationFor: DerefMut;
// Required method
exec fn deref_mut(&mut self) -> &mut Self::Target;
}pub trait ExDerefMut: Deref + PointeeSized {
type ExternalTraitSpecificationFor: DerefMut;
// Required method
exec fn deref_mut(&mut self) -> &mut Self::Target;
}