/// <summary>
 /// This function is called when an overlay is about to be inflated. It returns the overlay layout
 /// resource identifier (R.layout... not the view identifier) for the specified category. </summary>
 /// <param name="category"> content category. </param>
 /// <returns> overlay layout resource identifier. </returns>
 protected internal virtual int getOverlayLayoutId(string category)
 {
     return(EngagementResourcesUtils.getLayoutId(mContext, LAYOUT_NOTIFICATION_OVERLAY));
 }