'Parameters
offset : pair of floats
The offset to apply to the path, in points.
**kwargs :
All keyword arguments are passed through to the
:class:`~matplotlib.patches.PathPatch` constructor. The
properties which cannot be overridden are "path", "clip_box"
"transform" and "clip_path".'

def __init__(self, offset=(0, 0), **kwargs):

    super(PathPatchEffect, self).__init__(offset=offset)
    self.patch = mpatches.PathPatch([], **kwargs)
