-#Example:
-#
-# my $balance = balance(
-# $start, $end,
-# 'no_as' => 1, #set to true when using in a WHERE clause (supress AS clause)
-# #or 0 / omit when using in a SELECT clause as a column
-# # ("AS balance_$start_$end")
-# 'sum' => 1, #set to true to get a SUM() of the values, for totals
-#
-# #obsolete? options for totals (passed to cust_main::balance_date_sql)
-# 'total' => 1, #set to true to remove all customer comparison clauses
-# 'join' => $join, #JOIN clause
-# 'where' => \@where, #WHERE clause hashref (elements "AND"ed together)
-# )
-
-#sub balance {