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

{
    "primaryFilterClassNameMap": {
        "open": "Espo\\Modules\\Crm\\Classes\\Select\\CaseObj\\PrimaryFilters\\Open",
        "closed": "Espo\\Modules\\Crm\\Classes\\Select\\CaseObj\\PrimaryFilters\\Closed"
    },
    "boolFilterClassNameMap": {
        "open": "Espo\\Modules\\Crm\\Classes\\Select\\CaseObj\\BoolFilters\\Open"
    }
}