in src/SwitchTransition.js [6:17]
function areChildrenDifferent(oldChildren, newChildren) {
if (oldChildren === newChildren) return false;
if (
React.isValidElement(oldChildren) &&
React.isValidElement(newChildren) &&
oldChildren.key != null &&
oldChildren.key === newChildren.key
) {
return false;
}
return true;
}