containerHeightLayout: Layouter = (layout, containerFrame) => {
  return layout.map(layoutInfo => ({
    ...layoutInfo,
    frame: {
      origin: layoutInfo.frame.origin,
      size: {
        width: layoutInfo.frame.size.width,
        height: containerFrame.size.height,
      },
    },
  }));
}
A layouter that sets all frames' heights to `containerFrame.size.height`.