def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
    self.root_name = root_name
    self.vendored_names = set(vendored_names)
    self.vendor_pkg = (vendor_pkg or root_name.replace('extern', '_vendor'))
def __init__(self, root_name, vendored_names=(), vendor_pkg=None):
    self.root_name = root_name
    self.vendored_names = set(vendored_names)
    self.vendor_pkg = (vendor_pkg or root_name.replace('extern', '_vendor'))