BitMap (starrocks-bdb-je 18.3.17 API)

```
public class BitMap
extends Object
```
Bitmap which supports indexing with long arguments. java.util.BitSet provides all the functionality and performance we need, but requires integer indexing. Long indexing is implemented by keeping a Map of java.util.BitSets, where each bitset covers 2^16 bits worth of values. The Bitmap may be sparse, in that each segment is only instantiated when needed. Note that this class is currently not thread safe; adding a new bitset segment is not protected.

Constructors
Constructor and Description
`BitMap()`

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`boolean`	`get(long index)`
`void`	`set(long index)`

public void set(long index)
         throws IndexOutOfBoundsException

public boolean get(long index)
            throws IndexOutOfBoundsException

Class BitMap