Method permission

atomic-identity/src/delegation.rs:443–448

Add a permission.

(mut self, permission: DelegationPermission)

    /// Add a permission.
    pub fn permission(mut self, permission: DelegationPermission) -> Self {
        if !self.permissions.contains(&permission) {
            self.permissions.push(permission);
        }
        self
    }

    /// Add several permissions.
    pub fn permissions(