%% my $default = { color => '#000000', size => 14 };
%% format(basic => $default.merge({bold => true()}));

{
   "selection"  : 0,
   "worksheets" : [
      {
         "column_widths" : [ 14.6, 18.5, 15.8, 12.2 ],
         "name"          : "Merge Report 1",
         "selection"     : [ 1, 9 ],
         "row_heights"   : [ 25, 18, 18, 18 ],
         "cells"         : [
            %% for $rows -> $row {
            [
               [% c($row.value1, "basic") %],
               [% c($row.value2, "basic") %],
               [% c($row.value3, "basic") %],
               [% c($row.value4, "basic") %]
            ]
            %% }
         ],
        "merge" : [
            [% merge('A1:D1', 'Merged Cells', 'basic') %]
        ] 
      }
   ]
}