Bug 121352 The data set binding property cannot be retrieved in report preview layout
In report preview page, the datasource/dataset property binding lists cannot be retrieved. The dataset binding can not work correctly in layout preview because it's value cannot get from the binding list. But in the data set edit page, the binding value can be got. You can refer to the attachment.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
*/
	public ConfigVariable findConfigVariabel( String variableName )
	{
		StructureDefn defn = (StructureDefn) MetaDataDictionary.getInstance( )
				.getStructure( ConfigVariable.CONFIG_VAR_STRUCT );
		return (ConfigVariable) StructureRefUtil.findStructure( this, defn,
				variableName );
	}
	/**
	 * Finds an embedded image by name.
	 * 
	 * @param imageName
	 *            the embedded image name
	 * @return the defined image that matches, or <code>null</code> if the
	 *         image name was not found in the embedded images.
	 */
	public EmbeddedImage findImage( String imageName )
	{
		StructureDefn defn = (StructureDefn) MetaDataDictionary.getInstance( )
				.getStructure( EmbeddedImage.EMBEDDED_IMAGE_STRUCT );
		return (EmbeddedImage) StructureRefUtil.findStructure( this, defn,
				imageName );
	}
	/**
	 * Gets the property definition whose detail type is of the given structure
	 * name.
	 * 
	 * @param structureName
	 *            the structure name to search
	 * @return the property definition whose detail type is of the given