def __init__(self, groups=None):
        super(GroupedRequirements, self).__init__(NamedRequirements)
        self.groups = groups or self.default_groups
        self.filename = None
        self.create_default_groups()
def __init__(self, branch, package):
		Base.__init__(self)
		self.branch = branch
		self.package = package
		self.sp_obj = None