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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 SetCACertificatesPath(self, ca_certificates_path):
 """Sets the path to the CA certificates. Args: ca_certificates_path (str):
 path to file containing a list of root certificates to trust. Raises: BadConfigOption: if the CA certificates file does not exist. """

    if not ca_certificates_path:
      return

    if not os.path.exists(ca_certificates_path):
      raise errors.BadConfigOption(
          'No such certificate file: {0:s}.'.format(ca_certificates_path))

    self._ca_certs = ca_certificates_path
    logger.debug('Elasticsearch ca_certs: {0!s}'.format(ca_certificates_path))