pub trait SubtreePolicy {
// Required method
fn validate(
&self,
state: &State,
policy_domain: &Domain,
domain_after_op: &Domain,
) -> Result<()>;
}pub trait SubtreePolicy {
// Required method
fn validate(
&self,
state: &State,
policy_domain: &Domain,
domain_after_op: &Domain,
) -> Result<()>;
}