* Don't show "context" for classes without either contextType or contextTypes
* For classes with contextTypes, change the label to "legacy context" instead

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Originally reported by @gaearon via https://github.com/bvaughn/react-devtools-experimental/issues/368
b
         s
        a = parentA;
        b = parentB;
      } else {
         T
         d
         w
        
         S
        let didFindChild = false;
        let child = parentA.child;
        while (child) {
          if (child === a) {
            didFindChild = true;
            a = parentA;
            b = parentB;
            break;
          }
          if (child === b) {
            didFindChild = true;
            b = parentA;
            a = parentB;
            break;
          }
          child = child.sibling;
        }
        if (!didFindChild) {
           S
          child = parentB.child;