Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
return allExceptions;
	}
	/**
	 * Returns the validation executor.
	 * 
	 * @return the validation executor
	 */
	public ValidationExecutor getValidationExecutor( )
	{
		return validationExecutor;
	}
	/**
	 * Adds one validation listener. The duplicate listener will not be added.
	 * 
	 * @param listener
	 *            the validation listener to add
	 */
	public void addValidationListener( IValidationListener listener )
	{
		if ( validationListeners == null )
			validationListeners = new ArrayList( );
		if ( !validationListeners.contains( listener ) )
			validationListeners.add( listener );
	}
	/**
	 * Removes one validation listener. If the listener not registered, then the
	 * request is silently ignored.
	 * 
	 * @param listener
	 *            the validation listener to remove