Smaws_Client_Lightsail.EnableAddOnEnables or modifies an add-on for an Amazon Lightsail resource. For more information, see the Amazon Lightsail Developer Guide.
val error_to_string : 
  [ Smaws_Lib.Protocols.AwsJson.error
  | `AccessDeniedException of Types.access_denied_exception
  | `InvalidInputException of Types.invalid_input_exception
  | `NotFoundException of Types.not_found_exception
  | `OperationFailureException of Types.operation_failure_exception
  | `ServiceException of Types.service_exception
  | `UnauthenticatedException of Types.unauthenticated_exception ] ->
  stringval request : 
  'http_type Smaws_Lib.Context.t ->
  Types.enable_add_on_request ->
  (Types.enable_add_on_result,
    [> Smaws_Lib.Protocols.AwsJson.error
    | `AccessDeniedException of Types.access_denied_exception
    | `InvalidInputException of Types.invalid_input_exception
    | `NotFoundException of Types.not_found_exception
    | `OperationFailureException of Types.operation_failure_exception
    | `ServiceException of Types.service_exception
    | `UnauthenticatedException of Types.unauthenticated_exception ])
    Stdlib.result