PRFilePrivate
=============
Layer-dependent implementation data.
Syntax
------
.. code::
#include <prio.h>
typedef struct PRFilePrivate PRFilePrivate;
Description
-----------
A layer implementer should collect all the private data of the layer in
the :ref:`PRFilePrivate` structure. Each layer has its own definition of
:ref:`PRFilePrivate`, which is hidden from other layers as well as from the
users of the layer.
