code: def ca_bundle(self, ca_bundle):
          
          if ca_bundle is not None and not re.search('^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$', ca_bundle):
              raise ValueError("Invalid value for `ca_bundle`, must be a follow pattern or equal to `/^(?:[A-Za-z0-9+\/]{4})*(?:[A-Za-z0-9+\/]{2}==|[A-Za-z0-9+\/]{3}=)?$/`")
  
          self._ca_bundle = ca_bundle
docs: Sets the ca_bundle of this V1alpha1WebhookClientConfig.
          `caBundle` is a PEM encoded CA bundle which will be used to validate the webhook's server certificate. If unspecified, system trust roots on the apiserver are used.
  
          :param ca_bundle: The ca_bundle of this V1alpha1WebhookClientConfig.
          :type: str