Super short code

Instead of using code in each line you can create a series of serialized form methods, you can use:

$form->addButton([
     "Button1",
     "Button2"
     ], [null,"textures/items/diamond.png"]);

So you can do it with CustomForm methods, for example addInput:

$form->addInput(
     [
     "Name",
     "Age"
    ], 
    [
    "ex: LootSpace369",
    "ex: 10"
    ],
    [
    "LootSpace369",
    "10"
    ]);