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);
	}
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
Checks if is user formula .