code: func NewAggregations() Aggregations {
  	return Aggregations{
  		Data: make([]Aggregation, 0),
  		DefaultAggregation: Aggregation{
  			Name:              "default",
  			Pattern:           regexp.MustCompile(".*"),
  			XFilesFactor:      0.5,
  			AggregationMethod: []Method{Avg},
  		},
  	}
  }
docs: // NewAggregations create instance of Aggregations