A CTAspectStack is a CTAspect combined with an amount that shows how many aspect points the stack will be made of.

Importing the package

Link to importing-the-package

It might be required for you to import the package if you encounter any issues, so better be safe than sorry and add the import.
import thaumcraft.aspect.CTAspectStack;

Retrieving such an object

Link to retrieving-such-an-object

You can retrieve a CTAspectStack object from the CTAspectStack Bracket Handler object:

ZenScript
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val aspect = <aspect:ignis>;
NombreType
Nombre
amount
Type
int
Nombre
internal
Type
CTAspect

Setting the amount

Link to setting-the-amount

ZenScript
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//They do the same, both return a new CTAspectStack
val aspect = <aspect:ignis> * 10;

val aspect1 = <aspect:ignis>.setAmount(10);