globalErrorKeys
Set error_keys on the data_map object itself, regardless of webhook context.
SignalWire reads error_keys only on a webhook, so keys set here don’t mark any response as
an error. To detect errors, call errorKeys() after each webhook.
Parameters
keys
Response keys that indicate an error occurred.
Returns
DataMap — Self for method chaining.
Example
The keys land on the data_map object, not on the webhook: