Supported fields for query parameter in sessions API

[nickaein]

The documentation for sessions API:

Retrieve Release Health Session Statistics

states for query parameter that:

query (string)
A free-form query that is applied as a filter.
An example query could be release:"1.1.0" or release:"1.2.0" .

but doesn’t specify what are other available fields for filtering (e.g. can I filter active sessions by device OS version?). Is there any documentation on supported fields?