CleanUtil (Apache Parquet Hadoop 1.11.1 API)

```
public class CleanUtil
extends Object
```
A Helper class which use reflections to clean up DirectBuffer. It's implemented for better compatibility with both java8 and java9+, because the Cleaner class is moved to another place since java9+. Strongly inspired by: https://github.com/apache/tomcat/blob/master/java/org/apache/tomcat/util/buf/ByteBufferUtils.java

All Methods Static Methods Concrete Methods
Modifier and Type	Method and Description
`static void`	`cleanDirectBuffer(ByteBuffer buf)`

public static void cleanDirectBuffer(ByteBuffer buf)

Class CleanUtil