internal void InstantiateChildComponentOnFrame(ref RenderTreeFrame frame)
{
if (frame.FrameType != RenderTreeFrameType.Component)
{
throw new ArgumentException($"The frame's {nameof(RenderTreeFrame.FrameType)} property must equal {RenderTreeFrameType.Component}", nameof(frame));
}
if (frame.Component != null)
{
throw new ArgumentException($"The frame already has a non-null component instance", nameof(frame));
}
var newComponent = InstantiateComponent(frame.ComponentType);
var newComponentId = AssignComponentId(newComponent);
frame = frame.WithComponentInstance(newComponentId, newComponent);
}