Constant vulkanalia::vk::KHR_SWAPCHAIN_MUTABLE_FORMAT_EXTENSION

pub const KHR_SWAPCHAIN_MUTABLE_FORMAT_EXTENSION: [i8; 256];

https://www.khronos.org/registry/vulkan/specs/1.2-extensions/man/html/VK_KHR_swapchain_mutable_format.html