pub trait HasGMLAttributes {
// Required methods
fn attributes(&self) -> &Vec<(String, GMLValue)>;
fn attributes_mut(&mut self) -> &mut Vec<(String, GMLValue)>;
}
pub trait HasGMLAttributes {
// Required methods
fn attributes(&self) -> &Vec<(String, GMLValue)>;
fn attributes_mut(&mut self) -> &mut Vec<(String, GMLValue)>;
}