VK_MEMORY_OVERALLOCATION_BEHAVIOR_ALLOWED_AMD

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

Meta