code: def Page_addScriptToEvaluateOnLoad(self, scriptSource):
  		
  		assert isinstance(scriptSource, (str,)
  		    ), "Argument 'scriptSource' must be of type '['str']'. Received type: '%s'" % type(
  		    scriptSource)
  		subdom_funcs = self.synchronous_command('Page.addScriptToEvaluateOnLoad',
  		    scriptSource=scriptSource)
  		return subdom_funcs
docs: Function path: Page.addScriptToEvaluateOnLoad
  			Domain: Page
  			Method name: addScriptToEvaluateOnLoad
  		
  			WARNING: This function is marked 'Experimental'!
  		
  			Parameters:
  				Required arguments:
  					'scriptSource' (type: string) -> No description
  			Returns:
  				'identifier' (type: ScriptIdentifier) -> Identifier of the added script.
  		
  			Description: Deprecated, please use addScriptToEvaluateOnNewDocument instead.