src/org/tiefaces/components/websheet/utility/ParserUtility.java
public static boolean isValidateMethodString(final String str) {
		if (str == null) {
			return false;
		}
		return str.startsWith(TieConstants.METHOD_VALIDATE_PREFIX);
	}
public static boolean isValidateMethodString(final String str) {
		if (str == null) {
			return false;
		}
		return str.startsWith(TieConstants.METHOD_VALIDATE_PREFIX);
	}
validate method start with $validate{ rule="..." error="..."}.

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