return canBeNull;
else { canBeNull = inputParameter.allowNull( ); } return  canBeNull;
	private boolean canBeNull( )	{		boolean canBeNull = false;		if ( PARAM_CONTROL_LIST.equals( getSelectedControlType( ) )				|| DesignChoiceConstants.PARAM_CONTROL_TEXT_BOX.equals( getSelectedControlType( ) ) )		{			if ( dirtyProperties.containsKey( CHECKBOX_ALLOW_NULL ) )			{				canBeNull = ( (Boolean) dirtyProperties.get( CHECKBOX_ALLOW_NULL ) ).booleanValue( );			}			else			{				canBeNull = inputParameter.allowNull( );			}		}		return canBeNull;	}