Above can be a plain case of contacting the nameless purpose pointed by variable Foo. If you phone this operate it returns undefined. realistic - informed or expressing consciousness of factors as they really are; "a realistic description"; "a realistic view of the chances"; "a realistic appraisal of our odds"; https://www.slideshare.net/slideshow/invest-in-serenity-and-smart-growth-with-signature-global-plots-farukhnagar/279187827