func (b *MemoryBackend) CountSample() {
	b.mu.Lock()
	b.sampledScore++
	atomic.AddInt64(&b.kept, 1)
	b.mu.Unlock()
}
// CountSample counts a trace sampled by the sampler.
CountSample counts a trace sampled by the sampler.
// CountSample counts a trace sampled by the sampler .
func (b *MemoryBackend) CountSample() {
	b.mu.Lock()
	b.sampledScore++
	atomic.AddInt64(&b.kept, 1)
	b.mu.Unlock()
}
func ( b * MemoryBackend ) CountSample ( ) { b . mu . Lock ( ) b . sampledScore ++ atomic . AddInt64 ( & b . kept , 1 ) b . mu . Unlock ( ) }
CountSample counts a trace sampled by the sampler.
CountSample counts a trace sampled by the sampler .