in atomresponder/atom_message.py [0:0]
def biggest_poster_image(self):
"""
Finds the biggest poster image on the content and returns it.
:return: image_info object for the biggest poster image, or None if no images are defined.
"""
rtn = None
for entry in self.posterImages:
if rtn is None:
rtn = entry
continue
if entry.size > rtn.size:
rtn = entry
return rtn