MongoDbIndex constructor
MongoDbIndex()
Implementation
MongoDbIndex(this.keys, this.key, this.unique, this.sparse, this.background,
this.dropDups, this.partialFilterExpression, this.name);
MongoDbIndex(this.keys, this.key, this.unique, this.sparse, this.background,
this.dropDups, this.partialFilterExpression, this.name);