What a method prefixed with `#` means?
This is perhaps the stupidest question ever. But I often see method with names prefixed with a
example: https://deno.land/std@0.187.0/streams/text_line_stream.ts?source#L40
#example: https://deno.land/std@0.187.0/streams/text_line_stream.ts?source#L40
