well this does not describe the mechanism for getting attention anyway--particularly for a codependent who enjoys making themselves apparent by their absence, sometimes (bc the pointed comments by their friends get to be too hard to ignore or whatever; usually some new peer who sees through the charade and is not afraid to name it is in the ascendancy or something like that)--even if it seems to, and fwiw i would suggest doing the exact opposite, maybe even playing "fake it til you make it," but isolating, what you are describing, does not equate to "not seeking attention" like it might seem to, and one can even examine their desire to have someone knock on the door or call in that state for their specific truth in the matter i guess.
Isolating is usually an attempt at getting attention too iow; the weird part is, when the phone rings and one doesn't pick it up, it is bc they maybe want more attention, or a better way to say that might be "more focus on themselves" by others, "attention" generally being the last thing ppl in this certain, (possessed) state want i guess.
Iow it is a control move that codependents use, at least quite often