code: def add(self, entry, local_file):
          
          row = self.rowClass()
  
          for key, val in entry.items():
              if key in self.columns:
                  setattr(row, key, val)
  
          row.local_filename = os.path.join('.', os.path.relpath(local_file))
  
          self.rows.append(row)
docs: Add a metadata row.