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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 schema(self) -> dict: """ A property method that'll return the constructed provider schema. Schema MUST be an object and this method must be overridden :return: JSON schema of the provider """

        if not self._merged_schema:
            log.debug("merging required dict into schema for %s", self.name)
            self._merged_schema = self._schema.copy()
            self._merged_schema.update(self._required)
        return self._merged_schema