Bug 176436 Charts Imported from Libraries do not update when libraries change
During a live presentation of BIRT at EclipseCon, we came across a rather embarassing issue. When charts are included in a library, and imported into a report design from a library, any changes to the library instance of the chart do not reflect in the report itself.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/GroupPropertyHandle.java
}
		actStack.commit( );
	}
	/**
	 * Set the string value on a group of elements. This operation will be
	 * executed within a transaction, it will be rollbacked if any set operation
	 * failed.
	 * 
	 * @param value
	 *            the string value to set
	 * @throws SemanticException
	 *             if the property is undefined on an element or the string
	 *             value is invalid.
	 * @see SimpleValueHandle#setStringValue(String)
	 */
	public void setStringValue( String value ) throws SemanticException
	{
		setValue( value );
	}
	/**
	 * Return the property definition.
	 * 
	 * @return the property definition.
	 */
	public IElementPropertyDefn getPropertyDefn( )
	{
		return this.propDefn;
	}
	/**
	 * Clears the value of the property on every element.