Conform more of the codebase to strictNullChecks (#10573)
* Conform more of the codebase to `strictNullChecks` * Iterate
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@@ -90,11 +90,13 @@ export default class LeftPanel extends React.Component<IProps, IState> {
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}
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public componentDidMount(): void {
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UIStore.instance.trackElementDimensions("ListContainer", this.listContainerRef.current);
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if (this.listContainerRef.current) {
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UIStore.instance.trackElementDimensions("ListContainer", this.listContainerRef.current);
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// Using the passive option to not block the main thread
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// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#improving_scrolling_performance_with_passive_listeners
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this.listContainerRef.current.addEventListener("scroll", this.onScroll, { passive: true });
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}
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UIStore.instance.on("ListContainer", this.refreshStickyHeaders);
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// Using the passive option to not block the main thread
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// https://developer.mozilla.org/en-US/docs/Web/API/EventTarget/addEventListener#improving_scrolling_performance_with_passive_listeners
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this.listContainerRef.current?.addEventListener("scroll", this.onScroll, { passive: true });
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}
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public componentWillUnmount(): void {
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