}
private void assertNotDelimited(String expressionString) {
if ((expressionString.startsWith("#{") && expressionString.endsWith("}"))
|| (expressionString.startsWith("${") && expressionString.endsWith("}"))) {
throw new ParserException(expressionString, "This expression '" + expressionString
+ "' being parsed is expected be an 'eval' EL expression string. "
+ "Do not attempt to enclose such expression strings in #{} or ${} delimiters. "
+ "If you need to parse a template that mixes literal text with evaluatable blocks, "
+ "set the 'template' parser context attribute to true.", null);
}