withDefaultGlobalConfig = () =>
  /** @type {OverlayConfig} */ ({
    placementMode: 'global',
    contentNode: fixtureSync(html`<p>my content</p>`),
  })
@typedef {import('../types/OverlayConfig.js').OverlayConfig} OverlayConfig
@typedef {import('../types/OverlayConfig.js').ViewportPlacement} ViewportPlacement