src/vs/workbench/contrib/preferences/browser/preferencesWidgets.ts/SearchWidget/createSearchContainer
class SearchWidget:	private createSearchContainer(searchContainer: HTMLElement) {
		this.searchContainer = searchContainer;
		const searchInput = DOM.append(this.searchContainer, DOM.$('div.settings-search-input'));
		this.inputBox = this._register(this.createInputBox(searchInput));
		this._register(this.inputBox.onDidChange(value => this._onDidChange.fire(value)));
	}