code: func NewFiltersAggregation() *FiltersAggregation {
  	return &FiltersAggregation{
  		unnamedFilters:  make([]Query, 0),
  		namedFilters:    make(map[string]Query),
  		subAggregations: make(map[string]Aggregation),
  	}
  }
docs: // NewFiltersAggregation initializes a new FiltersAggregation.