Convert a configuration into a `lsst.daf.base.PropertySet`.
Parameters
----------
config : `lsst.pex.config.Config`
    Configuration instance.
Returns
-------
propertySet : `lsst.daf.base.PropertySet`
    A `~lsst.daf.base.PropertySet` that is equivalent to the ``config``
    instance. If ``config`` is `None` then this return value is also
    `None`.
See also
--------
lsst.daf.base.PropertySet
 
Definition at line 36 of file convert.py.
   37     """Convert a configuration into a `lsst.daf.base.PropertySet`. 
   41     config : `lsst.pex.config.Config` 
   42         Configuration instance. 
   46     propertySet : `lsst.daf.base.PropertySet` 
   47         A `~lsst.daf.base.PropertySet` that is equivalent to the ``config`` 
   48         instance. If ``config`` is `None` then this return value is also 
   53     lsst.daf.base.PropertySet 
   56         raise RuntimeError(
"lsst.daf.base is not available")
 
   59         for k, v 
in dict_.items():
 
   60             name = prefix + 
"." + k 
if prefix 
is not None else k
 
   61             if isinstance(v, dict):
 
   66     if config 
is not None:
 
   68         _helper(ps, 
None, config.toDict())