          Parameters
          ----------
          arguments: :class:`argparse.Namespace`
              The :mod:`argparse` arguments as passed in from :mod:`tools.py`
  
          Returns
          ----------
          arguments: :class:`argparse.Namespace`
              The :mod:`argparse` arguments as passed in with converter default
              arguments added
 
</s> remove     def _generate_converter_arguments(arguments):
        """ Add the default converter arguments to the initial arguments.
 </s> add     def _generate_converter_arguments(arguments, available_masks):
        """ Add the default converter arguments to the initial arguments. Ensure the mask selection
        is available. </s> remove     def __init__(self, arguments, samples, display, lock, trigger, config_tools, tk_vars):
        logger.debug("Initializing %s: (arguments: '%s', samples: %s: display: %s, lock: %s,"
                     " trigger: %s, config_tools: %s, tk_vars %s)", self.__class__.__name__,
                     arguments, samples, display, lock, trigger, config_tools, tk_vars)
 </s> add     def __init__(self, arguments, available_masks, samples,
                 display, lock, trigger, config_tools, tk_vars):
        logger.debug("Initializing %s: (arguments: '%s', available_masks: %s, samples: %s, "
                     "display: %s, lock: %s, trigger: %s, config_tools: %s, tk_vars %s)",
                     self.__class__.__name__, arguments, available_masks, samples, display, lock,
                     trigger, config_tools, tk_vars)
        available_masks: list
            The masks that are available for convert
          Parameters
          ----------
          arguments: :class:`argparse.Namespace`
              The :mod:`argparse` arguments as passed in from :mod:`tools.py`
        available_masks: list
            The masks that are available for convert
          Returns
          ----------
          arguments: :class:`argparse.Namespace`
              The :mod:`argparse` arguments as passed in with converter default
              arguments added
keep keep keep keep replace keep keep keep keep keep
 Convert - bugfixes
- Default mask to an available mask in Preview tool
- Correctly output predicted mask 
tools/preview.py