The build ID for the running application.
The build ID of an application is a string containing a hexadecimal representation of an arbitrarily sized sequence of bytes. This string can be used to match a specific ahead-of-time compiled version of an application, for example, to determine which debugging artifacts emitted during compilation should be used to translate crash and error reports.
The build ID is only available for ahead-of-time compiled programs. If a
build ID is not available, the value is
external static String? get buildId;