Wrap the upload entry points of an initialised renderer: a classic
WebGLRenderer's context, a WebGPURenderer's device queue, or the WebGL2
context of a WebGPURenderer on its WebGL fallback backend. Call after
renderer.init() for WebGPU. Idempotent; never throws.
Parameters
renderer: unknown
Returns "webgl"|"webgpu"|null
which backend was wrapped, or null when none was reachable
Wrap the upload entry points of an initialised renderer: a classic
WebGLRenderer's context, aWebGPURenderer's device queue, or the WebGL2 context of aWebGPURendereron its WebGL fallback backend. Call afterrenderer.init()for WebGPU. Idempotent; never throws.