child of #14942
doc : https://checkstyle.org/checks/coding/requirethis.html#RequireThis

from the doc :

Checks that references to instance variables and methods of the present object are explicitly of the form "this.varName" or "this.methodName(args)" and that those references don't rely on the default behavior when "this." is absent.

Unnamed variables are not instance variables also we can't have unnamed methods, so this check does not need any update.