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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 prepare_headers(self, headers):
 """Prepares the given HTTP headers."""


        if headers:
            self.headers = CaseInsensitiveDict((to_native_string(name), value) for name, value in headers.items())
        else:
            self.headers = CaseInsensitiveDict()