VK_NV_EXTERNAL_MEMORY_WIN32_SPEC_VERSION

Undocumented in source but is binding to an external library. You might be able to learn more by searching the web for its name.
version(VK_USE_PLATFORM_WIN32_KHR)
@nogc nothrow extern (System)
enum VK_NV_EXTERNAL_MEMORY_WIN32_SPEC_VERSION = 1;

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