code: function() {
      // Add other event listeners.
      addEvent(cellsContainer, 'click', updateNotice);
      addEvent(window, 'resize', delayedResize);
      addEvent(window, 'scroll', delayedScroll);
  
      // Initialize array of column heights and container width.
      columnCount = getColumnCount();
      resetHeights(columnCount);
  
      // Load cells for the first time.
      manageCells();
    }
docs: Initialize the layout.