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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_representation_doc(self):
 """ Return documentation for the representation of the resource. """

        if not self.representation:
            return 'N/A'
        fields = {}
        for name, field in self.representation.fields.items():
            fields[name] = self._get_field_doc(field)
        return fields