code: private void evaluateExpressions() throws JspException {
          /* 
           * Note: we don't check for type mismatches here; we assume
           * the expression evaluator will return the expected type
           * (by virtue of knowledge we give it about what that type is).
           * A ClassCastException here is truly unexpected, so we let it
           * propagate up.
           */
  
          if (value_ != null) {
              value = ExpressionEvaluatorManager.evaluate(
                      "value", value_, Object.class, this, pageContext);
          }
      }
docs: Evaluates expressions as necessary