src/vs/workbench/contrib/debug/common/debugModel.ts/DebugModel/getSession
class DebugModel:	getSession(sessionId: string | undefined, includeInactive = false): IDebugSession | undefined {
		if (sessionId) {
			return this.getSessions(includeInactive).find(s => s.getId() === sessionId);
		}
		return undefined;
	}