code: func NewRangeQueryResultsHelper(enableHashing bool, maxDegree uint32) (*RangeQueryResultsHelper, error) {
  	helper := &RangeQueryResultsHelper{pendingResults: nil,
  		hashingEnabled: enableHashing,
  		maxDegree:      maxDegree,
  		mt:             nil}
  	if enableHashing {
  		var err error
  		if helper.mt, err = newMerkleTree(maxDegree); err != nil {
  			return nil, err
  		}
  	}
  	return helper, nil
  }
docs: // NewRangeQueryResultsHelper constructs a RangeQueryResultsHelper