Error is special arg, used to hold errors with key "err".

Int is common arg, that contain arbitrary int value.

Int64 is common arg, that contain arbitrary int64.

String is common arg, that contain arbitrary string.

Addr is string argument with name "addr".

AppName is string argument with name "app".

Count represents integer arg with name "count".

Delta arg contains duration of some event with name "delta".

Elapsed arg contains duration of some event with name "elapsed".

Host is string argument with name "host".

ID64 is number argument with name "id".

ID64List contains multiple IDs.

Method is string argument with name "method".

Name is string argument with name "name".

NameList contains multiple names.

Nil is special case arg, that represents nil values.

RayID is string argument with name "rayId".

SQL is string argument with name "sql".

Type is string argument with name "type".

TypeList contains multiple types.

URL is string argument with name "url".