Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
import org.eclipse.birt.report.model.core.Structure;
import org.eclipse.birt.report.model.elements.DataSet;
import org.eclipse.birt.report.model.elements.GridItem;
import org.eclipse.birt.report.model.elements.GroupElement;
import org.eclipse.birt.report.model.elements.Library;
import org.eclipse.birt.report.model.elements.ReportItem;
import org.eclipse.birt.report.model.elements.TableItem;
import org.eclipse.birt.report.model.elements.Theme;
import org.eclipse.birt.report.model.elements.interfaces.IDesignElementModel;
import org.eclipse.birt.report.model.elements.interfaces.IExtendedItemModel;
import org.eclipse.birt.report.model.elements.interfaces.IGroupElementModel;
import org.eclipse.birt.report.model.elements.interfaces.ILibraryModel;
import org.eclipse.birt.report.model.elements.interfaces.IOdaExtendableElementModel;
import org.eclipse.birt.report.model.elements.interfaces.IStyleModel;
import org.eclipse.birt.report.model.elements.interfaces.IStyledElementModel;
import org.eclipse.birt.report.model.elements.interfaces.IThemeModel;
import org.eclipse.birt.report.model.extension.IExtendableElement;
import org.eclipse.birt.report.model.i18n.ModelMessages;
import org.eclipse.birt.report.model.i18n.ThreadResources;
import org.eclipse.birt.report.model.metadata.ElementDefn;
import org.eclipse.birt.report.model.metadata.ElementPropertyDefn;
import org.eclipse.birt.report.model.metadata.ElementRefValue;
import org.eclipse.birt.report.model.metadata.MetaDataDictionary;
import org.eclipse.birt.report.model.metadata.PropertyDefn;
import org.eclipse.birt.report.model.metadata.ReferenceValue;
import org.eclipse.birt.report.model.parser.DesignParserException;
import org.eclipse.birt.report.model.parser.DesignSchemaConstants;
import org.xml.sax.SAXException;
import com.ibm.icu.text.CollationKey;
import com.ibm.icu.text.Collator;