Formats Datum objects for printing and parses strings to Datum objects.
format the set of Datums using a consistent and optimized format. First introduced to support DasAxis, where tighter coupling between the two is required to efficiently provide context.
Returns the datum formatted as a String with special formatting characters. As with format, this should be out-of-context and should be tagged with the Units. The default implementation just returns the result of {@link #format(org.das2.datum.Datum)}