TopMetricsAggregation provides wrong properties and is missing the "missing" property

[f-loris]

🐛 Wrong type

The missing for TopMetricsAggregation is defined per field and not per aggregation. Currently, it is only possible to define the field but no missing property.

elasticsearch-specification/specification/_types/aggregations/metric.ts

Line 431 in c7ee66d

field: Field

see https://www.elastic.co/docs/reference/aggregations/search-aggregations-metrics-top-metrics#_missing

Besides that, TopMetricsAggregation inherits from MetricAggregationBase which wrongly inherits a missing and script, which are both not available according to https://www.elastic.co/docs/reference/aggregations/search-aggregations-metrics-top-metrics . Note, the missing is wrongly available per aggregation and not per field.

Definition

As a first solution to at least provide support for a proper definition of missing, the TopMetricsValue needs to be extended by missing: FieldValue:

export class TopMetricsValue {
  field: Field
  missing: FieldValue;
}

Changing the inheritance from MetricAggregationBase might have further implications I'm not aware of.