presto-spi/src/main/java/io/prestosql/spi/block/DuplicateMapKeyException.java/DuplicateMapKeyException/DuplicateMapKeyException
class DuplicateMapKeyException:    public DuplicateMapKeyException(Block block, int position)
    {
        super("Duplicate map keys are not allowed");
        this.block = block;
        this.position = position;
    }