code: function(oTable, sColumnId, iLevel) {
  			var oColumnMapItem = TableColumnUtils.getColumnMapItem(oTable, sColumnId);
  			if (!oColumnMapItem) {
  				return undefined;
  			}
  
  			var aChildren = [];
  			var iEnd;
  			if (iLevel === undefined) {
  				iEnd = oColumnMapItem.levelInfo.length;
  			} else {
  				iEnd = iLevel + 1;
  			}
  
  			for (var i = iLevel || 0; i < iEnd; i++) {
  				var oLevelInfo = oColumnMapItem.levelInfo[i];
  				for (var j = 0; j < oLevelInfo.spannedColumns.length; j++) {
  					aChildren.push({column: oLevelInfo.spannedColumns[j], level: i});
  				}
  			}
  
  			return aChildren;
  		}
docs: Returns an array of the column information about all columns which are spanned by the column identified by sColumnId.
  If there is no "parent", it returns undefined.
  
  @param {sap.ui.table.Table} oTable Instance of the table.
  @param {string} sColumnId ID of the column for which the Span-parent shall be found.
  @param {int} [iLevel] level where the parent is looked up.
  @returns {Array.<{column: sap.ui.table.Column, level: int}>|undefined} Array of column information.
  @private