FYI: the failing tests in FuelMetalevel are due to this bug: https://pharo.fogbugz.com/f/cases/14081/Removing-a-trait-usage-raises-an-exception <https://pharo.fogbugz.com/f/cases/14081/Removing-a-trait-usage-raises-an-exception>
FYI: the failing tests in FuelMetalevel are due to this bug: https://pharo.fogbugz.com/f/cases/14081/Removing-a-trait-usage-raises-an-exception <https://pharo.fogbugz.com/f/cases/14081/Removing-a-trait-usage-raises-an-exception>