Get a sequence of filled indexes.
The last non-empty bin.
The first non-empty bin.
The number of bins between the first non-empty one (inclusive) and the last non-empty one (exclusive).
The number of non-empty bins.
Get the low and high edge of a bin (given by index number).
Find the bin index associated with numerical value x.
Find the bin index associated with numerical value x.
Long.MIN_VALUE if x is NaN, the bin index if it is between Long.MIN_VALUE + 1 and Long.MAX_VALUE, otherwise saturate at the endpoints.
Return true iff x is in the nanflow region (equal to NaN).