dont crash with null-ref (#12274)
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@ -164,7 +164,9 @@ class SwitchingColumnsArea extends React.PureComponent {
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}
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setRef = c => {
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this.node = c.getWrappedInstance();
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if (c) {
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this.node = c.getWrappedInstance();
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}
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}
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render () {
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