I'm trying to achieve the following search and hoped others might have some helpful suggestions? I have two events from a summary index: `type_A` and `type_B`. They share a common field `entity_id` that may or may not match. I want to get all events of `type_B` where there is an event of `type_A` with a matching `entity_id`.  From this result, in `type_B` I have some wildcard fields (a common `wildcard_field` name with different sub-fields, such as `wildcard_field.field1`, `wildcard_field.field2`) and I want to extract the data for those fields into a table for visualisation. Example of event structure:     { event: type_A; entity_id: 123; } { event: type_B; entity_id: 123; // Matches a type_A event wildcard_field.field1: val1; wildcard_field.field2: val2; } { event: type_B; entity_id: 345; // This one won't have a matching type_A event wildcard_field.field1: val1; wildcard_field.field2: val2; }     Thank you for any suggestions   ... View more