Embedded types should be at the top of the field list of a struct.

And there should be an empty line separating embedded fields from regular fields

collectors/memstatMetric.go

@@ -40,6 +40,7 @@ type MemstatCollectorNode struct {
 
 type MemstatCollector struct {
 	metricCollector
+
 	stats       map[string]int64
 	tags        map[string]string
 	matches     map[string]string