'Create worksheet panes and mark them as frozen.
Args:
row:      The cell row (zero indexed).
col:      The cell column (zero indexed).
top_row:  Topmost visible row in scrolling region of pane.
left_col: Leftmost visible row in scrolling region of pane.
Returns:
0:  Nothing.'

@convert_cell_args
def freeze_panes(self, row, col, top_row=None, left_col=None, pane_type=0):

    if (top_row is None):
        top_row = row
    if (left_col is None):
        left_col = col
    self.panes = [row, col, top_row, left_col, pane_type]
