def METHOD_NAME(self):
    """Synchronize CRLs
    :return: S_OK(bool)/S_ERROR()
    """
    X509_CERT_DIR = False
    if "X509_CERT_DIR" in os.environ:
        X509_CERT_DIR = os.environ["X509_CERT_DIR"]
        del os.environ["X509_CERT_DIR"]
    result = self.syncDir("CRLs", Locations.getCAsLocation())
    if X509_CERT_DIR:
        os.environ["X509_CERT_DIR"] = X509_CERT_DIR
    return result