code: function initialize() {
    this.sortClass = UNDEFINED;
    this.sortColumnIndex = UNDEFINED;
    this.sortDirection = UNDEFINED;
    this.tableData = [];
    this.bindProperties();
    if ( this.ui.sortButton ) {
      this.sortColumnIndex = this.getColumnIndex();
  
      this.sortDirection = DIRECTIONS.UP;
      if ( this.ui.sortButton.classList.contains( this.classes.sortDown ) ) {
        this.sortDirection = DIRECTIONS.DOWN;
      }
  
      this.updateTable();
    }
  }
docs: Function used to create computed and triggered properties.