@NotNull
    XExpression toXExpression() {
      if (myEvaluationMode == null) {
        myEvaluationMode = EvaluationMode.EXPRESSION;
      }
      return new XExpressionImpl(XmlStringUtil.unescapeIllegalXmlChars(myExpression),
                                 Language.findLanguageByID(myLanguageId),
                                 myCustomInfo,
                                 myEvaluationMode);
    }
@NotNull
    XExpression toXExpression()