Bug 184563 Need clearAggregateOns() api on ComputedColumnHandle
Since current aggregateOn in ComputedColumn could be a list, we need a convenient method to clear all the values in one call.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/ComputedColumnHandleTest.java
/*******************************************************************************
 * Copyright (c) 2004 Actuate Corporation.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *  Actuate Corporation  - initial API and implementation
 *******************************************************************************/
package org.eclipse.birt.report.model.api;
import java.util.List;
import org.eclipse.birt.report.model.api.elements.structures.ComputedColumn;
import org.eclipse.birt.report.model.util.BaseTestCase;
/**
 * API test cases for ComputedColumnHandle.
 * 
 */
public class ComputedColumnHandleTest extends BaseTestCase
{
	/**