[Seerah]

Yes, if you wanted to do it that way, then it'd look like this.

myOptions = {
     type = "group",
     args = {
          myButton = {
               name = "My Button",
               type = "execute",
               desc = "Click me to do stuff!",
               func = function()
                              --do something here
                         end,
               image = function()
                              return "Interface\\Transmogrify\\Transmogrify", 20, 20
                         end,
               imageCoords = {0.4, 0.6, 0.4, 0.6},
          },
     },
}

But if your image is static, then don't create an extra function.