Why an operation is not currently invokable (for a clear caller-facing rejection).
True when the operation may be dispatched.
Optional
Human-readable reason when not invokable.
Machine-readable reason code when not invokable (e.g. OPERATION_DISABLED, OPERATION_NOT_APPROVED).
OPERATION_DISABLED
OPERATION_NOT_APPROVED
Why an operation is not currently invokable (for a clear caller-facing rejection).