    class ConfigurationError(Exception):

    class Configurable:

        ## Init ##
        def __init__(self):

        ## Configuration
        def config(self):
        def setting(self, name, default=NoDefault):
        def hasSetting(self, name):
        def defaultConfig(self):
        def configFilename(self):
        def configName(self):
        def configReplacementValues(self):
        def userConfig(self):
        def printConfig(self, dest=None):
        def commandLineConfig(self):
    def addCommandLineSetting(name, value):
    def commandLineSetting(configName, settingName, default=NoDefault):