presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/cache/CachingHiveMetastore.java/CachingHiveMetastore/listTablePrivileges
class CachingHiveMetastore:    @Override
    public Set<HivePrivilegeInfo> listTablePrivileges(String databaseName, String tableName, String tableOwner, Optional<HivePrincipal> principal)
    {
        return get(tablePrivilegesCache, new UserTableKey(principal, databaseName, tableName, tableOwner));
    }