src/vs/workbench/contrib/preferences/browser/preferencesEditor.ts/SideBySidePreferencesWidget/setEditorVisible
class SideBySidePreferencesWidget:	setEditorVisible(visible: boolean, group: IEditorGroup | undefined): void {
		this.isVisible = visible;
		this.group = group;

		if (this.defaultPreferencesEditor) {
			this.defaultPreferencesEditor.setVisible(this.isVisible, this.group);
		}
		if (this.editablePreferencesEditor) {
			this.editablePreferencesEditor.setVisible(this.isVisible, this.group);
		}
	}