placed: the request is in view. partial: something is in view, but
history stops after the requested start or the range is wider than the
chart. no-data: nothing to show, the view is unchanged. unsupported:
the interval has no time buckets (tick or volume bars), so it has no dates
to go to. invalid: from or to is not a finite time, to is before
from, or (from setRange) the range id is not one the widget has.
cancelled: a newer request, a context change or destruction took over.
error: the history loader failed; the result's error says how.
placed: the request is in view.partial: something is in view, but history stops after the requested start or the range is wider than the chart.no-data: nothing to show, the view is unchanged.unsupported: the interval has no time buckets (tick or volume bars), so it has no dates to go to.invalid:fromortois not a finite time,tois beforefrom, or (fromsetRange) the range id is not one the widget has.cancelled: a newer request, a context change or destruction took over.error: the history loader failed; the result'serrorsays how.