We create many `useDebugValue` helpers, loggers and so one now, so we can feel less pain.

What matter (**Updated**)
- previewing complex values brifely like chrome devtools does it for arrays, sets, maps, objects,,,

I [wrote related twit](https://twitter.com/mxtnr/status/1178271362890240001) recently with one of my DebugValue helpers. screenshot out here:
<img width="556" alt="Screenshot 2019-09-29 at 14 01 53" src="https://user-images.githubusercontent.com/6201068/66700775-5648bf80-ecfd-11e9-93fe-089d451bcffa.png">
_my named hooks currently require a `label` option unless react babel cannot transform name of variable automatically_
_number = 42;
      get number() {
        return this._number;
      }
      set number(value) {
        this._number = value;
      }
    }
    const descriptor = ((Object.getOwnPropertyDescriptor(
      CustomData.prototype,
      'number',
    ): any): PropertyDescriptor<number>);
    descriptor.enumerable = true;