```
public class NullabilityHolder
extends java.lang.Object
```
Instances of this class simply track whether a value at an index is null. For simplicity and performance, it is expected that various setter methods setNull(int), setNulls(int, int), setNotNull(int) and setNotNulls(int, int) are invoked with monotonically increasing values for the index parameter.

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`hasNulls()`
`byte`	`isNullAt(int index)`	Returns 1 if null, 0 otherwise.
`int`	`numNulls()`
`void`	`reset()`
`void`	`setNotNull(int index)`
`void`	`setNotNulls(int startIndex, int num)`
`void`	`setNull(int index)`
`void`	`setNulls(int startIndex, int num)`
`int`	`size()`

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail
- NullabilityHolder
```
public NullabilityHolder(int size)
```

public void setNulls(int startIndex,
                     int num)

public void setNotNulls(int startIndex,
                        int num)

isNullAt
```
public byte isNullAt(int index)
```
Returns 1 if null, 0 otherwise.

Class NullabilityHolder