docs: def GetCellValue (self, column, default = None):
                  """ get a cell, return default if that cell does not exist
                          note that column and row START AT 1 same as excel
                  """
                  if isinstance(column, str):
                          column = ColumnToIndex(column)
                  if column in self:
                          if "content" in UserDict.__getitem__(self, column):
                                  return UserDict.__getitem__(self, column)["content"]
                  return default