code: def CSS_setKeyframeKey(self, styleSheetId, range, keyText):
  		
  		assert isinstance(keyText, (str,)
  		    ), "Argument 'keyText' must be of type '['str']'. Received type: '%s'" % type(
  		    keyText)
  		subdom_funcs = self.synchronous_command('CSS.setKeyframeKey',
  		    styleSheetId=styleSheetId, range=range, keyText=keyText)
  		return subdom_funcs
docs: Function path: CSS.setKeyframeKey
  			Domain: CSS
  			Method name: setKeyframeKey
  		
  			Parameters:
  				Required arguments:
  					'styleSheetId' (type: StyleSheetId) -> No description
  					'range' (type: SourceRange) -> No description
  					'keyText' (type: string) -> No description
  			Returns:
  				'keyText' (type: Value) -> The resulting key text after modification.
  		
  			Description: Modifies the keyframe rule key text.