Changing amount of an item in a function

[indigo gate]

So i have this code here but .amount(5) doesnt work and i dont really know what to change it to

function Alloys(out, in1, in2) {
    event.recipes.create.mixing(Item.of(out).amount(4), [in1, in2]).heated();
}
Alloys(C('brass_ingot'), MC('copper_ingot'), C('zinc_ingot'))

im gonna add more code so i wont be able to just type

Alloys(C('brass_ingot', 5), MC('copper_ingot'), C('zinc_ingot'))```

[graceful magnet]

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[indigo gate]

Nvm withCount(x) worked