docs: def exclude(self, scheduled_operation: ScheduledOperation) -> bool:
          """Omits a scheduled operation from the schedule, if present.
  
          Args:
              scheduled_operation: The operation to try to remove.
  
          Returns:
              True if the operation was present and is now removed, False if it
              was already not present.
          """
          try:
              self.scheduled_operations.remove(scheduled_operation)
              return True
          except ValueError:
              return False