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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def is_flask_route_function(ast_node):
 """Check whether function uses a route decorator."""

    for decorator in ast_node.decorator_list:
        if isinstance(decorator, ast.Call):
            if _get_last_of_iterable(get_call_names(decorator.func)) == 'route':
                return True
    return False