Function vkCreateBufferCollectionFUCHSIA 

pub unsafe extern "system" fn vkCreateBufferCollectionFUCHSIA(
    device: VkDevice,
    pCreateInfo: *const VkBufferCollectionCreateInfoFUCHSIA,
    pAllocator: *const VkAllocationCallbacks,
    pCollection: *mut VkBufferCollectionFUCHSIA,
) -> VkResult

Available if built with prototypes.