code: function getNetContainerHeight ( $container, isWindow, cache ) {
          var height;
  
          if ( cache && cache.netContainerHeight !== undefined ) {
              height = cache.netContainerHeight;
          } else {
              height = isWindow ?
                       getWindowDimension( $container, "Height" ) :
                       $container.innerHeight() - getContainerScrollbarWidths( $container, cache ).horizontal;
  
              if ( cache ) cache.netContainerHeight = height;
          }
  
          return height;
      }
docs: Gets the height of a jQuery-wrapped container, excluding scroll bars. Also supports quirks mode for window
  containers, unlike jQuery's $( window ).height(). Makes use of caching if a cache object is provided.
  
  @param   {jQuery}  $container
  @param   {boolean} isWindow    required to speed up the process
  @param   {Object}  [cache]
  @returns {number}