code: def loadRenderModel_Async(self, pchRenderModelName):
          
  
          fn = self.function_table.loadRenderModel_Async
          ppRenderModel = POINTER(RenderModel_t)()
          result = fn(pchRenderModelName, byref(ppRenderModel))
          if ppRenderModel:
              ppRenderModel = ppRenderModel.contents
          else:
              ppRenderModel = None
          return result, ppRenderModel
docs: Loads and returns a render model for use in the application. pchRenderModelName should be a render model name
          from the Prop_RenderModelName_String property or an absolute path name to a render model on disk. 
          * The resulting render model is valid until VR_Shutdown() is called or until FreeRenderModel() is called. When the 
          application is finished with the render model it should call FreeRenderModel() to free the memory associated
          with the model.
          * The method returns VRRenderModelError_Loading while the render model is still being loaded.
          The method returns VRRenderModelError_None once loaded successfully, otherwise will return an error.