Bug 184762 BIRT Model - Enhancments to the level defintion
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
import org.eclipse.birt.report.model.api.util.StringUtil;
import org.eclipse.birt.report.model.core.ContainerContext;
import org.eclipse.birt.report.model.core.DesignElement;
import org.eclipse.birt.report.model.core.Module;
import org.eclipse.birt.report.model.core.ReferencableStructure;
import org.eclipse.birt.report.model.core.Structure;
import org.eclipse.birt.report.model.core.StyledElement;
import org.eclipse.birt.report.model.elements.AccessControl;
import org.eclipse.birt.report.model.elements.AutoText;
import org.eclipse.birt.report.model.elements.CascadingParameterGroup;
import org.eclipse.birt.report.model.elements.Cell;
import org.eclipse.birt.report.model.elements.DataItem;
import org.eclipse.birt.report.model.elements.DataSet;
import org.eclipse.birt.report.model.elements.DataSource;
import org.eclipse.birt.report.model.elements.ElementVisitor;
import org.eclipse.birt.report.model.elements.ExtendedItem;
import org.eclipse.birt.report.model.elements.FreeForm;
import org.eclipse.birt.report.model.elements.GraphicMasterPage;
import org.eclipse.birt.report.model.elements.GridItem;
import org.eclipse.birt.report.model.elements.GroupElement;
import org.eclipse.birt.report.model.elements.ImageItem;
import org.eclipse.birt.report.model.elements.JointDataSet;
import org.eclipse.birt.report.model.elements.Label;
import org.eclipse.birt.report.model.elements.LineItem;
import org.eclipse.birt.report.model.elements.ListGroup;
import org.eclipse.birt.report.model.elements.ListItem;
import org.eclipse.birt.report.model.elements.ListingElement;
import org.eclipse.birt.report.model.elements.MasterPage;
import org.eclipse.birt.report.model.elements.OdaDataSet;
import org.eclipse.birt.report.model.elements.OdaDataSource;