How do I make an optional action for an Octane component?

I want to write an Octane/Glimmer style component where passing in the action is optional. What is the best way to write this?

For example, I want both of these uses of the component to be valid:

<MyComponent />
<MyComponent @validate= />

Right now, my component class has a lot of code that looks like this, checking to see if an action was passed in before calling it:

if (this.args.validate) {
  this.args.validate()
}

That works fine for one action, but not if I need to call several optional methods in succession. What other options are there?