espocrm-base/application/Espo/Resources/metadata/selectDefs/EmailAccount.json

{
    "accessControlFilterClassNameMap": {
        "mandatory": "Espo\\Classes\\Select\\EmailAccount\\AccessControlFilters\\Mandatory"
    },
    "primaryFilterClassNameMap": {
        "active": "Espo\\Classes\\Select\\EmailAccount\\PrimaryFilters\\Active"
    }
}