ReadBufferAllocator (Netty5/Transport 5.0.0.Alpha5 API)

```
public interface ReadBufferAllocator
```
Implementations of this interface can influence how Buffers are allocated that are used when reading from the transport.

Method Summary

All Methods Static Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`io.netty5.buffer.Buffer`	`allocate(io.netty5.buffer.BufferAllocator allocator, int estimatedCapacity)`	Allocates a `Buffer` that is used for the next actual read to store the data in.
`static ReadBufferAllocator`	`exact(int numBytes)`	Return a `ReadBufferAllocator` that will return a `Buffer` that has exact `numBytes` of writable bytes.

- Method Detail
  - allocate
```
io.netty5.buffer.Buffer allocate(io.netty5.buffer.BufferAllocator allocator,
                                 int estimatedCapacity)
```
    Allocates a Buffer that is used for the next actual read to store the data in.
    
    Parameters:
    
    allocator - The BufferAllocator that might be used for the allocation. While its fine to not use the BufferAllocator it is important that the returned Buffer matches the BufferAllocator.getAllocationType() of the allocator.
    
    estimatedCapacity - the estimated capacity for the buffer. This is just a best guess and users might decide to use their own capacity.
    
    Returns:
    
    the Buffer that will be used or null if the read should not happen until the next ChannelOutboundInvoker.read(ReadBufferAllocator) call is done.
  - exact
```
static ReadBufferAllocator exact(int numBytes)
```
    Return a ReadBufferAllocator that will return a Buffer that has exact numBytes of writable bytes.
    
    Parameters:
    
    numBytes - the number of bytes that can be written.
    
    Returns:
    
    a ReadBufferAllocator.