addPrerenderingTask(fnPrerenderingTask, bFirst) {
			if (bFirst) {
				aPrerenderingTasks.unshift(fnPrerenderingTask);
			} else {
				aPrerenderingTasks.push(fnPrerenderingTask);
			}
		}
Adds a task that is guaranteed to run once, just before the next rendering. A rendering
request is not triggered.

@param {function} fnPrerenderingTask
  A function that is called before the rendering
@param {boolean} [bFirst=false]
  Whether the task should become the first one, not the last one
@private
@ui5-restricted sap.ui.model.odata.v4