presto-hive/src/main/java/io/prestosql/plugin/hive/metastore/HivePrivilegeInfo.java/HivePrivilegeInfo/toString
class HivePrivilegeInfo:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("privilege", hivePrivilege)
                .add("grantOption", grantOption)
                .add("grantor", grantor)
                .add("grantee", grantee)
                .toString();
    }