[jQuery] Clarifications one the jQuery.prototype.init.prototype line

[jQuery] Clarifications one the jQuery.prototype.init.prototype line


Can anyone explain to me in detail, what exactly this line of code
does:
jQuery.prototype.init.prototype = jQuery.prototype;
I just can't wrap my mind around it clearly... figure it has some-
kinda relation to the map-over functions at the top of jQuery but... I
need some sort of walk-through...