Include a lead_symbol = "all" option?

[maread99]

Should a lead_symbol = "all" option be introduced to evalute the period against a composite of all underlying calendars as opposed to a specific calendar?

The period would be evaluated such that:

• start and end evaluate to sessions/times of the composite calendar.
• durations are evaluated against the minutes / sessions of the composite calendar.

Please 👍 this comment if you would find this option useful.

Without giving it too much thought, might require:

• Could an option be added to existing daterange.Getter_ subclasses to work off a calendar_utils.CompositeCalendar? Or would it be necessary to define dedicated GetterCompDaily and GetterCompIntraday classes?

Would definiitely require:

• updating relevant docs.
• updating relevant tutorials.