Bug 120317 Set "dimension" property to 3D in "properties" view, error appears in layout editor.
Description: Set "dimension" property to 3D in "properties" view, error appears in layout editor. Steps to reproduce: 1. Add a 2D chart in property editor. 2. Set its dimension property to "three-dimension" in properties view. 3. Error appears in chart.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/extension/IPropertyDefinition.java
* 
	 * @return a list of {@link IChoiceDefinition}objects
	 */
	List getChoices( );
	/**
	 * Returns a list of member definitions if the property is a structure (type
	 * is TBD). Should return null for non-structure properties.
	 * 
	 * @return the list of members as a collection of IPropertyDefn objects
	 */
	List getMembers( );
	/**
	 * Returns the default value for the property. Needed only if the element
	 * supports styles or inheritance. Not needed otherwise. No default is
	 * needed for a structure or list property.
	 * 
	 * @return the default value of the property
	 */
	Object getDefaultValue( );
	
	
	/**
	 * Returns the method information of this property.
	 * 
	 * @return the method information of this property. Return null, if this
	 *         property is not a method property.
	 */
	
	IMethodInfo getMethodInfo();
}