Meanwhile, there are the gardens like GitHub that are not walled and indeed plenty of spammers are very actively gardening all that content to spam Google with

Meanwhile, there are the gardens like GitHub that are not walled and indeed plenty of spammers are very actively gardening all that content to spam Google with and yet the masters themselves are incapable of indexing it. Maybe this is just a recent phenomenon but I find myself putting constants and various names from code into Google quoted for exact search and get slammed in the face with a "this literally does not exist you idiot, it has never been uttered" 0 results page.