pub trait AbacPolicyManager {
// Required methods
fn add_policy(&mut self, policy: AbacPolicy) -> Result<(), String>;
fn update_policy(
&mut self,
policy_id: &str,
dsl: &str,
) -> Result<(), String>;
fn evaluate_policy(
&self,
policy_id: &str,
attributes: &HashMap<String, String>,
) -> bool;
}