fn invoice_path(&self, invoice_id: &str) -> PathBuf {
        let mut path = self.root.join(INVOICE_DIRECTORY);
        path.push(invoice_id);
        path
    }
/// Return the path to the invoice directory for a particular bindle.
Return the path to the invoice directory for a particular bindle.
Return the path to the invoice directory for a particular bindle .
fn invoice_path(&self, invoice_id: &str) -> PathBuf {
        let mut path = self.root.join(INVOICE_DIRECTORY);
        path.push(invoice_id);
        path
    }
fn invoice_path ( & self , invoice_id : & str ) -> PathBuf { let mut path = self . root . join ( INVOICE_DIRECTORY ) ; path . push ( invoice_id ) ; path }
Return the path to the invoice directory for a particular bindle.
Return the path to the invoice directory for a particular bindle .
&self
invoice_id
&str
&self
invoice_id
&str