sessionId property
A unique session identification string.
A session is defined as the duration of an end user's interaction with the service over a certain period. Obfuscate this field for privacy concerns before providing it to the service. If this field is not available for some reason, send "UNKNOWN". Note that any improvements to the model for a particular tenant site, rely on this field being set correctly to some unique session_id. The maximum number of allowed characters is 255.
Required.
Implementation
core.String? sessionId;