getListItemDepth = function getListItemDepth(node) {
	  var depth = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : 0;

	  Object.keys(knownListItemDepthClasses).some(function (depthClass) {
	    if (node.classList.contains(depthClass)) {
	      depth = knownListItemDepthClasses[depthClass];
	    }
	  });
	  return depth;
	}
If we're pasting from one DraftEditor to another we can check to see if
 existing list item depth classes are being used and preserve this style