Variable ACTIVE_EFFECT_MODES`Const`

ACTIVE_EFFECT_MODES: Readonly<
    {
        ADD: 2;
        CUSTOM: 0;
        DOWNGRADE: 3;
        MULTIPLY: 1;
        OVERRIDE: 5;
        UPGRADE: 4;
    },
> = ...

Define the allowed ActiveEffect application modes. Other arbitrary mode numbers can be used by systems and modules to identify special behaviors and are ignored