human
Solve the following python programming problem given the following code:
@ staticmethod 
def init_application(**kwargs) : 
    def custom_headers(headers, path, url) : 
        if url.endswith ('.css') : 
            headers ['X-Is-Css-File'] = 'True' 
kwargs.update (max_age = 1000, mimetypes = { 
        '.foobar' : 'application/x-foo-bar', 
}, add_headers_function = kwargs) 
    return WhiteNoise (demo_app, ** kwargs) 

    
    

    Fix the buggy line: }, add_headers_function = kwargs)
assistant
#Here is Python program to fix the buggy line: }, add_headers_function = kwargs)
.

}, add_headers_function = def custom_headers()