public function list_( $args, $assoc_args ) {
		global $wp_roles;

		$output_roles = array();
		foreach ( $wp_roles->roles as $key => $role ) {
			$output_role = new stdClass();

			$output_role->name = $role['name'];
			$output_role->role = $key;

			$output_roles[] = $output_role;
		}

		$formatter = new Formatter( $assoc_args, $this->fields );
		$formatter->display_items( $output_roles );
	}