HeapSize (Apache Accumulo Core 2.0.0 API)

All Known Implementing Classes:

CachedBlock, CachedBlockQueue, LruBlockCache
```
public interface HeapSize
```
Implementations can be asked for an estimate of their size in bytes.
Useful for sizing caches. Its a given that implementation approximations do not account for 32 vs 64 bit nor for different VM implementations.
An Object's size is determined by the non-static data members in it, as well as the fixed Object overhead.
For example:
```
 public class SampleObject implements HeapSize {
   int[] numbers;
   int x;
 }
 
```

- Method Summary
  
  All Methods Instance Methods Abstract Methods
  Modifier and Type Method Description
  
  long heapSize()

- Method Detail
  - heapSize
```
long heapSize()
```
    Returns:
    
    Approximate 'exclusive deep size' of implementing object. Includes count of payload and hosting object sizings.