code: func PopulatedChunk(numSamples int, minTime int64) chunks.Meta {
  	samples := make([]Sample, numSamples)
  	for i := 0; i < numSamples; i++ {
  		samples[i] = sample{minTime + int64(i*1000), 1.0}
  	}
  	return ChunkFromSamples(samples)
  }
docs: // PopulatedChunk creates a chunk populated with samples every second starting at minTime