pub trait EasyLocation<'a>: Files<'a> {
// Required method
fn file_id(&'a self, byte_index: usize) -> <Self as Files<'a>>::FileId;
}pub trait EasyLocation<'a>: Files<'a> {
// Required method
fn file_id(&'a self, byte_index: usize) -> <Self as Files<'a>>::FileId;
}