Improve actor.itemTypes typing

[Socolin]

trafficstars

Hello,

I don't know if typescript allow it but could it be possible to automatically types items of actor.itemTypes:

When I'm accessing to types like:

let weapons = itemsByType['weapon'];
// Then I want to access to the data without additional check:
weapon[0].data.data.<property available weapon>

If I create a globa.d.ts with the following

import {ConfiguredDocumentClass} from '@league-of-foundry-developers/foundry-vtt-types/src/types/helperTypes';

declare global {
    class Actor extends ClientDocumentMixin(foundry.documents.BaseActor) {
        get itemTypes(): Record<
            'weapon',
            Array<InstanceType<ConfiguredDocumentClass<typeof foundry.documents.BaseItem>> & {data: {type: 'weapon'}}>
        >;
    }
}

it seems to work but I'm getting an error on class Actor TS2300: Duplicate identifier 'Actor'

1- Why am I getting an error class Actor could you provide an example type merging with more complex case in: https://github.com/League-of-Foundry-Developers/foundry-vtt-types/wiki/A-Quick-Guide-to-Declaration-Merging ? 2- Is there a way to make it available for all types without having to define each overload manually ?