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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_mapping(self, schema):
 """Get mapping for given resource or item schema. :param schema: resource or dict/list type item schema """

        properties = {}
        for field, field_schema in schema.items():
            field_mapping = self._get_field_mapping(field_schema)
            if field_mapping:
                properties[field] = field_mapping
        return {'properties': properties}