exitCode property
ExitCode is the command's own exit status. A non-zero one is a SUCCESSFUL call carrying a failed command — the HTTP status stays 200, because "the command failed" and "the call failed" are different facts and a caller has to be able to tell them apart.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? exitCode;