espocrm-base/application/Espo/Modules/Crm/Resources/metadata/selectDefs/Document.json

{
    "primaryFilterClassNameMap": {
        "active": "Espo\\Modules\\Crm\\Classes\\Select\\Document\\PrimaryFilters\\Active",
        "draft": "Espo\\Modules\\Crm\\Classes\\Select\\Document\\PrimaryFilters\\Draft"
    }
}