src/org/tiefaces/components/websheet/utility/ParserUtility.java
public static boolean isMethodString(final String str) {
		if (str == null) {
			return false;
		}
		return str.matches(TieConstants.METHOD_REGEX);
	}
public static boolean isMethodString(final String str) {
		if (str == null) {
			return false;
		}
		return str.matches(TieConstants.METHOD_REGEX);
	}
method string is start as $ follow by method name then with { and }. i.e.
$init{department.name}

@param str
the str
@return true, if is method string