Function vkGetPhysicalDeviceCooperativeVectorPropertiesNV 

pub unsafe extern "system" fn vkGetPhysicalDeviceCooperativeVectorPropertiesNV(
    physicalDevice: VkPhysicalDevice,
    pPropertyCount: *mut u32,
    pProperties: *mut VkCooperativeVectorPropertiesNV,
) -> VkResult

Available if built with prototypes.