---
features:
  - |
    Packstack can display parameter specific messages when a MESSAGE option
    is added to the parameter. If MESSAGE_VALUES exist for the parameter, the
    message will only be shown if the value provided by the user is included
    in MESSAGE_VALUES. Example:

        {"CMD_OPTION": "example-service-install",
         "OPTION_LIST": ["y", "n"],
         "VALIDATORS": [validators.validate_options],
         "DEFAULT_VALUE": 'n',
         "MASK_INPUT": False,
         "LOOSE_VALIDATION": False,
         "CONF_NAME": "CONFIG_EXAMPLE_SERVICE_INSTALL",
         "USE_DEFAULT": False,
         "NEED_CONFIRM": False,
         "CONDITION": False,
         "MESSAGE_VALUES": ["y"],
         "MESSAGE": "Example service installation will be removed from packstack in Pike"}

    In this case, if the user enable installation of example service, a message
    will be displayed at the end of packstack execution with content "Example
    service installation will be removed from packstack in Pike"