presto-hive/src/main/java/io/prestosql/plugin/hive/HiveMetadata.java/HiveMetadata/grantRoles
class HiveMetadata:    @Override
    public void grantRoles(ConnectorSession session, Set<String> roles, Set<PrestoPrincipal> grantees, boolean withAdminOption, Optional<PrestoPrincipal> grantor)
    {
        accessControlMetadata.grantRoles(session, roles, HivePrincipal.from(grantees), withAdminOption, grantor.map(HivePrincipal::from));
    }