Bug 123406 Add geLocaltStringProperty in GroupElementHandle and GroupPropertyHandle
Please refer to 123405. GUI need a way to get the local setting of given property because current getStringPropery method will return inherited value if there are no local value.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupElementHandle.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.Iterator;
import java.util.List;
import org.eclipse.birt.report.model.api.activity.SemanticException;
import org.eclipse.birt.report.model.core.Module;
import org.eclipse.birt.report.model.metadata.ElementPropertyDefn;
/**
 * This class provides services to deal with a group of elements. It is mostly
 * useful for some multiple-selection cases, elements of the same type(or share
 * the same base type) can be handled as a whole. User can perform some
 * operations on the collection of elements.
 * <p>
 * For our ease-of-use purpose, we support multiple selections across type.
 * Given a collection of elements, user can ask for their common