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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 _has_fulltext(cls, uri):
 		""" 		Enable full text search on the messages if possible and return True. 		If the full text search cannot be enabled, then return False. 		"""

		coll = cls._get_collection(uri)
		with ExceptionTrap(storage.pymongo.errors.OperationFailure) as trap:
			coll.create_index([('message', 'text')], background=True)
		return not trap