pub fn instance_extension_properties_cstr(
layer_name: Option<&CStr>,
sink: &mut [MaybeUninit<VkExtensionProperties>],
) -> Result<u32>pub fn instance_extension_properties_cstr(
layer_name: Option<&CStr>,
sink: &mut [MaybeUninit<VkExtensionProperties>],
) -> Result<u32>