[Simple-support] Conditionnaly serializing an element

[bubbleguuum <bub...@fr...>]

Let's say I have an element:

@Element
private String blargh;


In some cases I want to do serialization with the blargh element (if it 
has a value of course) and sometimes I want to do serialization without 
it (even if it has a value).

One inconvenient way to achieve serialization without it, would be to 
set blargh to null before serialization and restore its value after.

Is there something more convenient ?