var commandsToForceReadConcern = [
            "count",
            "distinct",
            "find",
            "geoNear",
            "geoSearch",
            "group",
            "mapReduce",
            "parallelCollectionScan",
        ];

        var forceReadConcern = Array.contains(commandsToForceReadConcern, cmdName);

        if (cmdName === "aggregate") {
            // Aggregate can be either a read or a write depending on whether it has a $out stage.
            // $out is required to be the last stage of the pipeline.
            var stages = obj.pipeline;
            const lastStage = stages && Array.isArray(stages) && (stages.length !== 0)
                ? stages[stages.length - 1]
                : undefined;
            const hasOut =
                lastStage && (typeof lastStage === 'object') && lastStage.hasOwnProperty('$out');
            const hasExplain = obj.hasOwnProperty("explain");

            if (!hasExplain && !hasOut) {
                    forceReadConcern = true;
            }
        }
       return forceReadConcern;