def METHOD_NAME(_context, file=None, files=None, package=None):
    if file is None:
        # set the default
        file = 'overrides.zcml'
    if files is not None or package is not None:
        raise ValueError("Neither the files or package argument is supported.")
    # now load the files if they exist
    for product in findProducts():
        zcml = os.path.join(os.path.dirname(product.__file__), file)
        if os.path.isfile(zcml):
            xmlconfig.includeOverrides(_context, zcml, package=product)