The path of the executable used to run the script in this isolate.
The literal path used to identify the script. This path might be relative or just be a name from which the executable was found by searching the system path.
Use resolvedExecutable to get an absolute path to the executable.
static String get executable => _Platform.executable;
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https://api.dart.dev/stable/2.5.0/dart-io/Platform/executable.html