Set custom property based on mime type of uploaded file

[dambridge]

I'd like to create a few categories/arrays of asset types based on mime type. Say, 'Images' contains PNG,JPEG,TIF and 'Documents' contains PDF, DOC and so on.

Assuming I have those two set as arrays or something, I'm unsure as to how I can get that detail and push it into the custom properties on upload.

I see there's a callback in usingName that allows one to to this:
->usingName(fn(MediaLibraryRequestItem $item) => strtolower($item->name))

is the same capability exposed for withCustomProperties?

The reason I'm doing this is so I can filter media by these categories. So when uploading, in pseudo, I'd say

if(mime-type IN imagesArray) {
    $customerProperty = 'Image'
}