handleValueChange: function(e) {
    if (e.val)
      this.props.onChange(e);
    else
      this.props.onRemove && this.props.onRemove(e);
  },
  componentDidMount: function() {
    component = this;

    var $select = $(this.refs.select.getDOMNode());
    var select2 = $select.select2({
      placeholder: this.props.emptyLabel,
      allowClear: this.props.allowClear
    }).on('change', this.handleValueChange);
  },