@classmethod
    def deregister(cls, plugin=None):
        global registered
        if not cls.isRegistered():
            raise NotRegisteredError("Class %s is not registered to a plugin" % cls.__name__)

        useThisPlugin = (plugin is None)
        mplugin = _getPlugin(plugin)
        cls._deregisterOverride(mplugin, useThisPlugin)
        if plugin is None:
            registered.remove(cls)

        cls._setRegisteredPluginObj(None)
Determines the value of the 'User-agent' header to use for HTTP requests.
dataset/ETHPy150Open CountZer0/PipelineConstructionSet/python/maya/site-packages/pymel-1.0.5/pymel/api/plugins.py/BasePluginMixin.deregister--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/tools/appcfg.py/GetUserAgent