Filter on multi select window in Freedom UI

Hi,

I have the following code to invoke a multi select window.

request.$context.executeRequest({
    type: "crt.OpenLookupPageRequest",
    $context: request.$context,
    entitySchemaName: "AccountType",
    //filtersConfig: add any filters here
    features: {
        select: {
            multiple: true,
            selectAll: false,
            resultType: 'lookupValues'
        },
        create: {
            enabled: false
        }
    },
});

I'm struggling with adding a filterconfig (I need a IN filter; if the value exist in a list of values).

Can you help with an example?

Thanks,

Chani