String (NamedScriptableDefinition variable) { if (!(variable instanceof MatchVariableConstraint constraint)) { return ""; } final String ref = constraint.getReferenceConstraint(); if (StringUtil.isEmpty(ref)) { return ""; } final String text = StringUtil.unquoteString(ref); return SSRBundle.message("reference.target.tooltip.message", constraint.isInvertReference() ? 1 : 0, text); }