InternalSpan (Couchbase JVM Core IO 2.0.1 API)

All Known Implementing Classes:

NoopInternalSpan, ThresholdInternalSpan
```
@Internal
public interface InternalSpan
```
The InternalSpan tracks the nitty gritty details of the request/response cycle inside the SDK.
As the name suggests it is not intended to be used by users of the SDK, only actual implementors need to worry about it. Users should look no further than the RequestSpan for passing in a parent span if needed.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`finish()`	Finishes the overall request span (does not touch or change any sub-spans).
`RequestContext`	`requestContext()`	Returns the request context so it can be accessed once set, usually by the tracer implementation.
`void`	`requestContext(RequestContext ctx)`	Called by the system once the request is created and gives the span a chance to look into request specific information.
`void`	`startDispatch()`	Signals the start of the IO network dispatch phase for this request.
`void`	`startPayloadEncoding()`	Signals the start of payload encoding, if needed for this request.
`void`	`stopDispatch()`	Signals the end of the IO network dispatch phase for this request.
`void`	`stopPayloadEncoding()`	Signals the end of payload encoding, if needed for this request.
`RequestSpan`	`toRequestSpan()`	Returns a request span that wraps the internal span.

- Method Detail
  - finish
```
void finish()
```
    Finishes the overall request span (does not touch or change any sub-spans).
  - requestContext
```
void requestContext(RequestContext ctx)
```
    Called by the system once the request is created and gives the span a chance to look into request specific information.
    
    Parameters:
    
    ctx - the request context once available.
  - requestContext
```
RequestContext requestContext()
```
    Returns the request context so it can be accessed once set, usually by the tracer implementation.
  - startPayloadEncoding
```
void startPayloadEncoding()
```
    Signals the start of payload encoding, if needed for this request.
  - stopPayloadEncoding
```
void stopPayloadEncoding()
```
    Signals the end of payload encoding, if needed for this request.
  - startDispatch
```
void startDispatch()
```
    Signals the start of the IO network dispatch phase for this request.
  - stopDispatch
```
void stopDispatch()
```
    Signals the end of the IO network dispatch phase for this request.
  - toRequestSpan
```
RequestSpan toRequestSpan()
```
    Returns a request span that wraps the internal span.