| Class | Description | 
|---|---|
| NativeResource | A  NativeResourceis an object representing a runtime element managed by the native side (such as a file, a socket, an image, ...). | 
| PoolOfImmortalByteBuffers | A pool of reusable immortal byte buffers. | 
| PoolOfLimitedReusableResources | A pool of resources where resources are allocated at creation time (no lazy allocation). | 
| PoolOfReusableResources | A pool of reusable resources. | 
| SNI | 
| Exception | Description | 
|---|---|
| NativeException | RuntimeExceptionsubclass that may be thrown from an SNI native usingSNI_throwNativeException()function. | 
| NativeIOException | IOExceptionsubclass that may be thrown from an SNI native usingSNI_throwNativeIOException()function. | 
ESR012).