public function set_role( $role ) {
		global $wp_roles;

		if ( $role && ! empty( $wp_roles->roles ) && ! in_array( $role, array_keys( $wp_roles->roles ), true ) ) {
			$this->error( 'customer_invalid_role', __( 'Invalid role', 'woocommerce' ) );
		}
		$this->set_prop( 'role', $role );
	}