@Override
    public String toString() {
        return "BulkUpdate(" +
                "dataType=" + this.getDataType() + ", " +
                "action=" + this.getAction() + ", " +
                "constraints=" + this.getFilters() + ", " +
                "trackStatistics=" + this.isTrackingStatistics() + ")";
    }
Applies this query to the given set of nodes, and returns the result.

@param nodes the input nodes
@param holderType the holder type the nodes are from
@return the transformed nodes, or null if no change was made
common/src/main/java/me/lucko/luckperms/common/bulkupdate/BulkUpdate.java