src/org/tiefaces/components/websheet/utility/CommandUtility.java
private static boolean isUserFormula(final String str) {
		return str.startsWith(TieConstants.USER_FORMULA_PREFIX)
				&& str.endsWith(TieConstants.USER_FORMULA_SUFFIX);
	}
private static boolean isUserFormula(final String str) {
		return str.startsWith(TieConstants.USER_FORMULA_PREFIX)
				&& str.endsWith(TieConstants.USER_FORMULA_SUFFIX);
	}
Checks if is user formula.

@param str
the str
@return true, if is user formula