clear_charges(distinct_id, modifiers, callback) {
        var data = {
            '$set': { '$transactions': [] },
            '$token': this.mixpanel.token,
            '$distinct_id': distinct_id
        };

        if (typeof(modifiers) === 'function') { callback = modifiers; }

        data = merge_modifiers(data, modifiers);

        if (this.mixpanel.config.debug) {
            this.mixpanel.config.logger.debug("Clearing this user's charges", { '$distinct_id': distinct_id });
        }

        this.mixpanel.send_request({ method: "GET", endpoint: "/engage", data: data }, callback);
    }
people.clear_charges(distinct_id, modifiers, callback)
        ---
        Clear all the current user's transactions.

        usage:

            mixpanel.people.clear_charges('bob');