running property
Running is how many of those are in running right now — the number a dispatcher weighs against Capacity. paused sessions are in Sessions and not here.
Please note: This property should have been non-nullable! Since the specification file does not include a default value (using the "default:" property), however, the generated source code must fall back to having a nullable type. Consider adding a "default:" property in the specification file to hide this note.
Implementation
int? running;