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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 objc_type_encoding(self):
 """Return the Objective-C type encoding as a str."""

        if not hasattr(self, '_objc_type_encoding'):
            self._objc_type_encoding = \
              conf.lib.clang_getDeclObjCTypeEncoding(self)

        return self._objc_type_encoding