The name of method parameters in obj-c is not significant. The argument label and argument name are different things. In `- (void)frobulateThing:(id)firstThing andAlso:(id)secondThing;`, `firstThing` and `secondThing` are the argument names and can be changed with no impact on the callers, while `frobulateThing:andAlso:` is the part relevant to callers.

In Swift the argument labels are the same as the argument names by default, but you can also supply different values for them.