Function vkWriteResourceDescriptorsEXT 

pub unsafe extern "system" fn vkWriteResourceDescriptorsEXT(
    device: VkDevice,
    resourceCount: u32,
    pResources: *const VkResourceDescriptorInfoEXT,
    pDescriptors: *const VkHostAddressRangeEXT,
) -> VkResult

Available if built with prototypes.