‰PNG

   
IHDR   Ÿ   f   Õ†C1   
sRGB ®Îé   gAMA  ±üa   	pHYs  à  Ã
Ço¨d  GIDATx^íÜL”÷ð÷Yçªö("Bh_ò«®¸¢§q5kÖ*:þ0A­ºšÖ¥]VkJ¢M»¶f¸±8\k2íll£1]q®ÙÔ‚ÆT

class Factory(object):
	def create(self, namespace):
		raise NotImplementedError()

class Provider(object):
	def set(self, namespace, option, value):
		raise NotImplementedError()

	def get(self, namespace, option, default=None):
		raise NotImplementedError()

	def unset(self, namespace, option):
		raise NotImplementedError()

	def clear(self):
		raise NotImplementedError()

	def load(self):
		raise NotImplementedError()

	def save(self):
		raise NotImplementedError()