content: class UserPreference:
      """
      Represents a configurable user preference.
      """
      def __init__(self, label, choices, default=None, description='', coerce=lambda x: x, warning=''):
          self.label = label
          self.choices = choices
          self.default = default if default is not None else choices[0]
          self.description = description
          self.coerce = coerce
          self.warning = warning
  