How can I read "Custom Offline" stats for Call Center Agents?

I currently have an app that reads "Agent Availability" using the API "agentLog" object:

https://api.netsapiens.com/ns-api/?object=statistics&action=read
{
domain: example.com
type: agentLog
start_date: 2016-08-16 00:00:00
end_date: 2016-08-17 23:00:00
group:
fields: L,B,AM,AAM
remove_zeros: true
}

Our client has added custom offline statuses to their Snap Solution. I.e. "Bathroom", "Staff Meeting", etc.

Are there "fields" that I can use to access the agentLog stats for custom statuses other than the standard "fields" found in the link below?