code: func NewIdxConfig() *IdxConfig {
  	return &IdxConfig{
  		Enabled:           false,
  		GcpProject:        "default",
  		BigtableInstance:  "default",
  		TableName:         "metrics",
  		WriteQueueSize:    100000,
  		WriteMaxFlushSize: 10000,
  		WriteConcurrency:  5,
  		UpdateBigtableIdx: true,
  		UpdateInterval:    time.Hour * 3,
  		PruneInterval:     time.Hour * 3,
  		CreateCF:          true,
  	}
  }
docs: // return StoreConfig with default values set.