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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 get_case_insensitive(self, dictionary, key, default=None):
 """Case-insensitive search of a dictionary for key. Returns the value if key match is found, otherwise default. """

        lower_key = key.lower()
        for k, v in dictionary.items():
            if lower_key == k.lower():
                return v
        else:
            return default