Boundary class of a time-axis label, passed to a custom timeFormatter as a
hint so a host can render adaptive labels (year at year boundaries, month at
month boundaries, day otherwise, clock intraday) — parity with common
tickMarkFormatter(time, tickMarkType) APIs.
Boundary class of a time-axis label, passed to a custom
timeFormatteras a hint so a host can render adaptive labels (year at year boundaries, month at month boundaries, day otherwise, clock intraday) — parity with commontickMarkFormatter(time, tickMarkType)APIs.