pub trait GetProjectId {
// Required methods
fn project_id(&self) -> ProjectId;
fn parent_id(&self) -> Option<ProjectId>;
fn root_id(&self) -> ProjectId;
// Provided method
fn is_root(&self) -> bool { ... }
}
pub trait GetProjectId {
// Required methods
fn project_id(&self) -> ProjectId;
fn parent_id(&self) -> Option<ProjectId>;
fn root_id(&self) -> ProjectId;
// Provided method
fn is_root(&self) -> bool { ... }
}