// return the totals of a slice of rows
func (t file_summary_by_instance_rows) totals() file_summary_by_instance_row {
var totals file_summary_by_instance_row
// return the totals of a slice of rows
func (t file_summary_by_instance_rows) totals() file_summary_by_instance_row {
var totals file_summary_by_instance_row