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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 element_focus_should_not_be_set(self, locator):
 		"""Verifies the element identified by `locator` does not have focus. 		| *Argument* | *Description* | *Example* | 		| locator | Selenium 2 element locator | id=my_id |"""


		self._info("Verifying element '%s' focus is not set" % locator)
		self._check_element_focus(False, locator)