大般涅槃經義記 7.355

7.355

初中，「涅槃亦復如是」總舉類空，無相義齊，故云如是。「無有住處，直是諸佛斷煩惱處，故名涅槃」辯相續空。

In the first part: "Nirvāṇa is also like this" generally cites it to compare with emptiness; because their markless meaning is equivalent, it therefore says "like this". "It has no dwelling place; it is simply the place where the buddhas have severed the defilements, and is therefore called nirvāṇa" explains the emptiness of the continuous succession.