pub trait SequenceMutExt<T: Clone>{
// Required method
fn as_vec_mut(&mut self) -> &mut Vec<T>;
// Provided method
fn imul(&mut self, vm: &VirtualMachine, n: isize) -> PyResult<()> { ... }
}
pub trait SequenceMutExt<T: Clone>{
// Required method
fn as_vec_mut(&mut self) -> &mut Vec<T>;
// Provided method
fn imul(&mut self, vm: &VirtualMachine, n: isize) -> PyResult<()> { ... }
}