code: func NewStoreConfig() *StoreConfig {
  	return &StoreConfig{
  		Enabled:           false,
  		GcpProject:        "default",
  		BigtableInstance:  "default",
  		TableName:         "metrics",
  		WriteQueueSize:    100000,
  		WriteMaxFlushSize: 10000,
  		WriteConcurrency:  10,
  		ReadConcurrency:   20,
  		MaxChunkSpan:      time.Hour * 6,
  		ReadTimeout:       time.Second * 5,
  		WriteTimeout:      time.Second * 5,
  		CreateCF:          true,
  	}
  }
docs: // return StoreConfig with default values set.