This API is subject to change. Bug fixes and new features will be released based on developer feedback throughout the preview period.
Updates the extended fields of an email design theme.
Unlike Update Email Design Theme, this method doesn't require the current revision.
Updating extended fields triggers the Email Design Theme Updated domain event.
You can only call this method when authenticated as a Wix app or Wix user identity.
This method doesn't return any custom errors, but may return standard errors. Learn more about standard Wix errors.