code: func NewAdjacencyMatrixAggregation() *AdjacencyMatrixAggregation {
  	return &AdjacencyMatrixAggregation{
  		filters:         make(map[string]Query),
  		subAggregations: make(map[string]Aggregation),
  	}
  }
docs: // NewAdjacencyMatrixAggregation initializes a new AdjacencyMatrixAggregation.