https://mongodb.github.io/mongo-csharp-driver/2.7/apidocs/html/M_MongoDB_Driver_MongoCollection_Group_2.htm
MongoCollection.Group Method (IMongoQuery, IMongoGroupBy, BsonDocument, BsonJavaScript,...
Runs the group command on this collection.
groupmethodbsondocument
https://developer.adobe.com/experience-manager/reference-materials/6-5/javadoc/org/bson/BsonJavaScript.html
BsonJavaScript (The Adobe AEM Quickstart and Web Application.)
adobe aemquickstartwebapplication
https://mongodb.github.io/mongo-csharp-driver/2.15/apidocs/html/Overload_MongoDB_Bson_BsonJavaScript_Equals.htm
BsonJavaScript.Equals Method
equalsmethod