Function vkGetPhysicalDeviceSurfaceCapabilitiesKHR 

pub unsafe extern "system" fn vkGetPhysicalDeviceSurfaceCapabilitiesKHR(
    physicalDevice: VkPhysicalDevice,
    surface: VkSurfaceKHR,
    pSurfaceCapabilities: *mut VkSurfaceCapabilitiesKHR,
) -> VkResult

Available if built with prototypes.