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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 validate(self):
 """Validate the configuration file."""

        validator = Draft4Validator(self.SCHEMA)
        if not validator.is_valid(self.config):
            for err in validator.iter_errors(self.config):
                LOGGER.error(str(err.message))
            validator.validate(self.config)