pub fn new() -> Self {
        Bill {
            items_by_tax: BTreeMap::new(),
        }
    }
/// Instantiates a new `Bill`
Instantiates a new `Bill`
Instantiates a new ` Bill `
pub fn new() -> Self {
        Bill {
            items_by_tax: BTreeMap::new(),
        }
    }
pub fn new ( ) -> Self { Bill { items_by_tax : BTreeMap :: new ( ) , } }
Instantiates a new `Bill`
Instantiates a new ` Bill `