THIS IS THE KEY -- select_element_by
select_element_by : id
select_element_by : name
select_element_by : xpath
select_element_by : id
THIS IS THE KEY -- locator
locator : locator for id
locator :  locator for name
locator : locator for xpath
locator :
THIS IS THE KEY -- trailer
trailer : click
trailer : clear
trailer : sendkeys
trailer : click
THIS IS THE KEY -- trailer_text
trailer_text : text for click
trailer_text : text for clear
trailer_text : text for send keys