Vulkan Foveated Rendering Example

Any chance on getting a reference implementation for Vulkan Foveated rendering (fixed or dynamic) within an OpenXR context? Been working through implementation with XrSwapchainCreateInfoFoveationFB and flags set to XR_SWAPCHAIN_CREATE_FOVEATION_FRAGMENT_DENSITY_MAP_BIT_FB and can create the swapchain fine, but unable to fish the VkImage references back out after creation. 

Any help appreciated, example even better!