code: function checkColumnTemplate(fnDoCheck, oScope, sType) {
  		var aTables = SupportHelper.find(oScope, true, "sap.ui.table.Table");
  		var aColumns, oTemplate;
  		for (var i = 0; i < aTables.length; i++) {
  			aColumns = aTables[i].getColumns();
  			for (var k = 0; k < aColumns.length; k++) {
  				oTemplate = aColumns[k].getTemplate();
  				if (oTemplate && oTemplate.isA(sType)) {
  					fnDoCheck(aTables[i], aColumns[k], oTemplate);
  				}
  			}
  		}
  	}
docs: ********************************************************** Helpers related to sap.ui.table Controls ********************************************************** 
  Loops over all columns of all visible tables and calls the given callback with the following parameters:
  table instance, column instance, column template instance.
  
  If the column does not have a template or a type is given and the template is not of this type the callback is not called.
  
  @param {function} fnDoCheck Callback
  @param {object} oScope The scope as given in the rule check function.
  @param {string} [sType] If given an additional type check is performed.