To extend the computer science example you gave, someone may want to demonstrate a certain feature or technique applicable to methods. If it is a general point about method definition or invocation and the actual method is not important, then if foo and bar are given as class names, the method is often referred to as foo.doSomething()
or bar.doSomeWork()
. This seemsThese seem to fit your requirement as a verb placeholderplaceholders, although it'sthey are not a single wordwords.
The closest I can think of in everyday usage is using an obscure or nonsense word as a placeholder, so maybe you are remembering a word like discombobulate
?