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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _setFlags(self):
 		""" Sets up the flags 'self.atEnd' and 'self.atStart'."""

		self.atEnd = not self.gametree.variations and (self.index + 1 == len(self.gametree))
		self.atStart = not self.stack and (self.index == 0)