deselectAll = function(e) {
    var topBlocks = this.workspace_.getTopBlocks(false);
    for (var i = 0, block; block = topBlocks[i]; i++) {
      block.removeSelect();
    }
  }
Show and populate the flyout.
@param {!Array|string} xmlList List of blocks to show.
    Variables and procedures have a custom set of blocks.