DefaultStartSpanFromContextFunc provides a default implementation for StartSpanFromContext function.

EnablePreRequestInterceptor is a global flag to enable pre request interceptor.

HttpTrackingFuncSingleton is a default implementation of HttpTrackingFunc.

HttpTrackingFunc is a callback to get the tracing info to log.

InterceptorFunc is a function which will be called before making a http request.

StartSpanFromContext is added for someone to override the implementation.