function fromValue(value) {
            if (!value) {
                return Severity.Ignore;
            }
            if (strings.equalsIgnoreCase(_error, value)) {
                return Severity.Error;
            }
            if (strings.equalsIgnoreCase(_warning, value) || strings.equalsIgnoreCase(_warn, value)) {
                return Severity.Warning;
            }
            if (strings.equalsIgnoreCase(_info, value)) {
                return Severity.Info;
            }
            return Severity.Ignore;
        }
Parses 'error', 'warning', 'warn', 'info' in call casings
and falls back to ignore.