Function onStart

packages/client/lib/client/tracing.spec.ts:221–223

(message: any)

      const events: Array<{ name: string; context: any }> = [];

      const onStart = (message: any) => {
        events.push({ name: 'start', context: message });
      };
      const onAsyncEnd = (message: any) => {
        events.push({ name: 'asyncEnd', context: message });
      };