fix after merge

src/aggregation/agg_req_with_accessor.rs

@@ -276,7 +276,7 @@ impl AggregationWithAccessor {
                 ..
             })
             | ExtendedStats(ExtendedStatsAggregation {
-                field: field_name, ..
+                field: ref field_name, ..
             })
             | Sum(SumAggregation {
                 field: ref field_name,

src/aggregation/metric/average.rs

@@ -3,7 +3,7 @@ use std::fmt::Debug;
 use serde::{Deserialize, Serialize};
 
 use super::IntermediateStats;
-
+use crate::aggregation::*;
 /// A single-value metric aggregation that computes the average of numeric values that are
 /// extracted from the aggregated documents.
 /// See [super::SingleMetricResult] for return value.

src/aggregation/metric/stats.rs

@@ -1,3 +1,4 @@
+use std::fmt::Debug;
 use serde::{Deserialize, Serialize};
 
 use super::*;