SingleFieldConstraintEBLeftSide con = new SingleFieldConstraintEBLeftSide();
con.setConstraintValueType( SingleFieldConstraint.TYPE_UNDEFINED );
fp.addConstraint( con );
con.setExpressionLeftSide( new ExpressionFormLine( new ExpressionUnboundFact( pattern ) ) );
modeller.refreshWidget();
popup.hide();
}
} );
popup.addAttribute( GuidedRuleEditorResources.CONSTANTS.ExpressionEditor(),
ebBtn );