<chapter id="cha-checklist-element">
  <title>
    Things to check when writing an element
  </title>
  <para>
  Make sure the state of an element gets reset when going to NULL.
  Ideally, this should set all object properties to their original state.
  This function should also be called from _init.
  </para>
</chapter>
<chapter id="cha-checklist-filter">
  <title>
    Things to check when writing a filter
  </title>
  <para>
  </para>
</chapter>
<chapter id="cha-checklist-srcsink">
  <title>
    Things to check when writing a source or sink
  </title>
  <para>
  </para>
</chapter>