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_
expect(map_of_maps[meta.inspectable]).toBeUndefined(); 
    expect(map_of_maps[meta.name]).toBe('Map');
    expect(map_of_maps[meta.type]).toBe('iterator');
    expect(map_of_maps[0][meta.type]).toBe('array');
    expect(react_element[meta.inspectable]).toBe(false);
    expect(react_element[meta.name]).toBe('span');
    expect(react_element[meta.type]).toBe('react_element');
    expect(set[meta.inspectable]).toBeUndefined(); 
    expect(set[meta.name]).toBe('Set');
    expect(set[meta.type]).toBe('iterator');
    expect(set[0]).toBe('abc');
    expect(set[1]).toBe(123);
    expect(set_of_sets[meta.inspectable]).toBeUndefined(); 
    expect(set_of_sets[meta.name]).toBe('Set');
    expect(set_of_sets[meta.type]).toBe('iterator');
    expect(set_of_sets['0'][meta.inspectable]).toBe(true);
    expect(symbol[meta.inspectable]).toBe(false);
    expect(symbol[meta.name]).toBe('Symbol(symbol)');
    expect(symbol[meta.type]).toBe('symbol');
    expect(typed_array[meta.inspectable]).toBeUndefined(); 
    expect(typed_array[meta.size]).toBe(3);
    expect(typed_array[meta.name]).toBe('Int8Array');
    expect(typed_array[meta.type]).toBe('typed_array');
    expect(typed_array[0]).toBe(100);
    expect(typed_array[1]).toBe(-100);
    expect(typed_array[2]).toBe(0);
    done();
  });
  it('should support custom objects with enumerable properties and getters', async done => {
    class CustomData {