code: function getClipboardContent(clipboardEvent) {
          var content = getDataTransferItems(clipboardEvent.clipboardData || editor.getDoc().dataTransfer);
  
          // Edge 15 has a broken HTML Clipboard API see https://developer.microsoft.com/en-us/microsoft-edge/platform/issues/11877517/
          return Utils.isMsEdge() ? Tools.extend(content, { 'text/html': '' }) : content;
        }
docs: Gets various content types out of the Clipboard API. It will also get the
  plain text using older IE and WebKit API:s.
  
  @param {ClipboardEvent} clipboardEvent Event fired on paste.
  @return {Object} Object with mime types and data for those mime types.