presto-local-file/src/main/java/io/prestosql/plugin/localfile/LocalFileColumnHandle.java/LocalFileColumnHandle/toString
class LocalFileColumnHandle:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("columnName", columnName)
                .add("columnType", columnType)
                .add("ordinalPosition", ordinalPosition)
                .toString();
    }