presto-thrift-api/src/main/java/io/prestosql/plugin/thrift/api/PrestoThriftNullableSchemaName.java/PrestoThriftNullableSchemaName/toString
class PrestoThriftNullableSchemaName:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("schemaName", schemaName)
                .toString();
    }