* 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
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        let nextChild = nextFiber.child;
        let prevChildAtSameIndex = prevFiber.child;
        while (nextChild) {
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           S
           W
          if (nextChild.alternate) {
            const prevChild = nextChild.alternate;
            if (
              updateFiberRecursively(
                nextChild,
                prevChild,
                shouldIncludeInTree ? nextFiber : parentFiber,
              )
            ) {
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               p
              shouldResetChildren = true;
            }
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             t
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            if (prevChild !== prevChildAtSameIndex) {
              shouldResetChildren = true;
            }
          } else {