If I want to enable the use of this to choose from a dynamic list of pets that’s populating the method, I need to go into the Triggers tab.

So first thing I need to do is add a trigger here.

Let’s call it a method we want to use is Find Pets let’s say this is a generic Get.

We’ll put as the identify key the ID will be human readable key word.

We know the pet name that we’re selecting as opposed to just seeing an ID number.

When I go back into the method, so let’s say I want to get pet by ID. Now,

I can come over to parameters.

I have the merge field for Pet ID, and what I can do is on the trigger, now I can select pet IDs. 

What this now means is that when I’m setting up the step, I can choose a look up. And that lookup will call the search Pet IDs, get me a list of all the IDs. And then I can choose the one that I want to fill in this method further, so that I can then get the pet specifically and get all the extra information around it.