code: func (rce RenderCommandEncoder) SetVertexBytes(bytes unsafe.Pointer, length uintptr, index int) {
  	C.RenderCommandEncoder_SetVertexBytes(rce.commandEncoder, bytes, C.size_t(length), C.uint_t(index))
  }
docs: // SetVertexBytes sets a block of data for the vertex function.
  //
  // Reference: https://developer.apple.com/documentation/metal/mtlrendercommandencoder/1515846-setvertexbytes.