Save the current context to be output with any errors.

    Args:
      file_name: string
      row_num: int
      row: list of strings
      headers: list of column headers, its order corresponding to row's

def SetFileContext(self, file_name, row_num, row, headers):
    """Save the current context to be output with any errors.

    Args:
      file_name: string
      row_num: int
      row: list of strings
      headers: list of column headers, its order corresponding to row's
    """
    self._context = (file_name, row_num, row, headers)