Function vkGetDisplayModePropertiesKHR 

pub unsafe extern "system" fn vkGetDisplayModePropertiesKHR(
    physicalDevice: VkPhysicalDevice,
    display: VkDisplayKHR,
    pPropertyCount: *mut u32,
    pProperties: *mut VkDisplayModePropertiesKHR,
) -> VkResult

Available if built with prototypes.