Set buffer mybuf to value 'hello':
    {buffer.set(mybuf,'hello')}
Buffer exists ?
    {buffer.exists(mybuf)}
Read the buffer, result will be hello:
    {buffer.get(mybuf)}
Remove the buffer:
    {buffer.remove(mybuf)}
Buffer exists ?
    {buffer.exists(mybuf)}
Since the buffer no longer exists, the default will be used:
    {buffer.get(mybuf,default='missing')}

<se:region whitespace="remove">
    {buffer.set(a, 1795)}

    <se:region>
        {buffer.set(a, 2)}
        {sys.eval(buffer.get(a) * 2)}/
    </se:region>
    
    {buffer.get(a)}
</se:region>
{buffer.get(a, default=0)}