human
Solve the following python programming problem given the following code:
def check_ast(model) : 
    def check_decorator(func) : 
        (tree, src) = get_method_ast (func) 
        print () 
        print () 
        print (src) 
        new_tree = TypeAST (model, func).visit (tree) 
        print_simple_ast (new_tree) 
        return func 
return model 

    
    

    Fix the buggy line: return model
assistant
#Here is Python program to fix the buggy line: return model
.

return def check_decorator(