pub trait Turtle: Debug {
// Required methods
fn begin(&mut self);
fn end(&mut self);
fn comment(&mut self, comment: String);
fn move_to(&mut self, to: Point<f64>);
fn line_to(&mut self, to: Point<f64>);
fn arc(&mut self, svg_arc: SvgArc<f64>);
fn cubic_bezier(&mut self, cbs: CubicBezierSegment<f64>);
fn quadratic_bezier(&mut self, qbs: QuadraticBezierSegment<f64>);
}