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   is_missing
         my $missing = $csv->is_missing ($column_idx);
...
       "column_names" are set in the hash-ref. If you still need to kn
+ow if
       all fields in each row are provided, you should enable "keep_me
+ta_info"
       so you can check the flags.

my $csv = Text::CSV_XS->new ({
    auto_diag      => 1,
    binary         => 1,
    keep_meta_info => 1,
    });