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/IReportItem.java
* @param propName
	 *            the name of the property to check
	 * @param value
	 *            the new property value as one of the supported BIRT types
	 * @see #getProperty
	 * @throws ExtendedElementException
	 *             if the property value is invalid or the property name is
	 *             invalid
	 */
	public void checkProperty( String propName, Object value )
			throws ExtendedElementException;
	/**
	 * Sets the value of a property. This operation is done in response to a
	 * BIRT-defined command. That is, this method call is the result of an
	 * application using the BIRT Model API to set a property. BIRT will have
	 * validated the property using the <code>checkProperty</code> method, and
	 * will have created a command to set the property.
	 * <p>
	 * If this element supports styles or inheritance, then the value can be
	 * <code>null</code>, which means to clear the property value so that it
	 * will inherit from the base element or the style.
	 * 
	 * @param propName
	 *            the name of the property to set
	 * @param value
	 *            the new property value as one of the supported BIRT types
	 * @see #getProperty
	 * @see #checkProperty
	 */
	public void setProperty( String propName, Object value );