21230 	Overlays.prototype.add = function(element, type, overlay) {  argument
21233 	    overlay = type;
21241 	  if (!overlay.position) {
21245 	  if (!overlay.html) {
21255 	  overlay = assign({}, this._overlayDefaults, overlay, {
21259 	    html: overlay.html
21262 	  this._addOverlay(overlay);
21286 	  forEach(overlays, function(overlay) {  argument
21288 	    var container = self._getOverlayContainer(overlay.element, true);
21290 	    if (overlay) {
21291 	      remove$2(overlay.html);
21292 	      remove$2(overlay.htmlContainer);
21294 	      delete overlay.htmlContainer;
21295 	      delete overlay.element;
21297 	      delete self._overlays[overlay.id];
21301 	      var idx = container.overlays.indexOf(overlay);
21350 	Overlays.prototype._updateOverlay = function(overlay) {  argument
21352 	  var position = overlay.position,
21353 	      htmlContainer = overlay.htmlContainer,
21354 	      element = overlay.element;
21444 	Overlays.prototype._addOverlay = function(overlay) {  argument
21446 	  var id = overlay.id,
21447 	      element = overlay.element,
21448 	      html = overlay.html,
21469 	  if (overlay.type) {
21470 	    classes$1(htmlContainer).add('djs-overlay-' + overlay.type);
21475 	  overlay.plane = plane;
21480 	  overlay.htmlContainer = htmlContainer;
21482 	  overlayContainer.overlays.push(overlay);
21485 	  this._overlays[id] = overlay;
21487 	  this._updateOverlay(overlay);
21488 	  this._updateOverlayVisibilty(overlay, this._canvas.viewbox());
21492 	Overlays.prototype._updateOverlayVisibilty = function(overlay, viewbox) {  argument
21493 	  var show = overlay.show,
21496 	      htmlContainer = overlay.htmlContainer,
21510 	  this._updateOverlayScale(overlay, viewbox);
21514 	Overlays.prototype._updateOverlayScale = function(overlay, viewbox) {  argument
21515 	  var shouldScale = overlay.scale,
21518 	      htmlContainer = overlay.htmlContainer;
21553 	  forEach(this._overlays, function(overlay) {  argument
21554 	    self._updateOverlayVisibilty(overlay, viewbox);
21614 	      forEach(container.overlays, function(overlay) {  argument
21615 	        self._updateOverlay(overlay);
57224 	    var overlay = constructOverlay(box);
57225 	    this._overlayId = this._overlays.add(element, overlay);