'Get a server supported feature\'s value.
A feature with the value L{None} is equivalent to the feature being
unsupported.
@type feature: C{str}
@param feature: Feature name
@type default: C{object}
@param default: The value to default to, assuming that C{feature}
is not supported
@return: Feature value'

def getFeature(self, feature, default=None):

    return self._features.get(feature, default)
