either of "up" or "down"
either of "min" or "max"
either of "min" or "max"
if None, this corresponds to original spacing, otherwise Some( timeSecs )
either of "min" or "max"
either of "min" or "max"
either of "up" or "down"
if None, this corresponds to original spacing, otherwise Some( timeSecs )
either of "up" or "down"
either of "min" or "max"
either of "min" or "max"
if None, this corresponds to original spacing, otherwise Some( timeSecs )