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_
if (string[0] === '/') {
    
    string = string.substring(1);
    
    if (string[string.length - 1] === '/') {
      string = string.substring(0, string.length - 1);
    }
    try {
      return new RegExp(string, 'i');
    } catch (err) {
      
      
      return new RegExp('.^');
    }
  }
  function isLetter(char: string) {
    return char.toLowerCase() !== char.toUpperCase();
  }
  function matchAnyCase(char: string) {