Is Scalable Link Interface (SLI) supported in Vulkan?

Two extensions were introduced after the release of Vulkan 1.0 to allow SLI-style rendering. The extensions are VK_KHR_device_group and VK_KHR_device_group_creation. At the time of the Vulkan 1.1 release, these extensions were pulled into core Vulkan.  More info can be found in this Stack Overflow issue.

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