object: object_raw::<E>,
            object_mut: object_mut_raw::<E>,

            object_raw: object_raw::<E>,
            object_mut_raw: object_mut_raw::<E>,

    object: fn(*const ()) -> *const (dyn StdError + Send + Sync + 'static),
    object_mut: fn(*mut ()) -> *mut (dyn StdError + Send + Sync + 'static),

    object_raw: fn(*const ()) -> *const (dyn StdError + Send + Sync + 'static),
    object_mut_raw: fn(*mut ()) -> *mut (dyn StdError + Send + Sync + 'static),

        unsafe { &*(self.vtable.object)(&self.error) }

        unsafe { &*(self.vtable.object_raw)(&self.error) }

        unsafe { &mut *(self.vtable.object_mut)(&mut self.error) }

        unsafe { &mut *(self.vtable.object_mut_raw)(&mut self.error) }