WP_REST_Search_Controller::sanitize_subtypes( string|array $subtypes, WP_REST_Request $request, string $parameter ): string[]|WP_Error

369	public function sanitize_subtypes( $subtypes, $request, $parameter ) {370		$subtypes = wp_parse_slug_list( $subtypes );371 372		$subtypes = rest_parse_request_arg( $subtypes, $request, $parameter );373		if ( is_wp_error( $subtypes ) ) {374			return $subtypes;375		}376 377		// 'any' overrides any other subtype.378		if ( in_array( self::TYPE_ANY, $subtypes, true ) ) {379			return array( self::TYPE_ANY );380		}381 382		$handler = $this->get_search_handler( $request );383		if ( is_wp_error( $handler ) ) {384			return $handler;385		}386 387		return array_intersect( $subtypes, $handler->get_subtypes() );388	}