The example https://developer.salesforce.com/docs/atlas.en-us.lightning.meta/lightning/controllers_server_actions_call.htm has
if (state === "SUCCESS") {
.......
}
else if (state === "INCOMPLETE") {
// do something
}
else if (state === "ERROR") {
......
What should "do something" be?
I've seen so many examples with "do something", including the code I wrote, that I'd thought I should stop doing this (copy and paste) and do something about it, pun intended.