This sample demonstrates the Spreadsheet freeze pane feature by applying frozen rows and columns.
Freeze Panes allows to keep the rows and columns visible while the rest of the sheet scrolls. You can specify number of frozen rows and columns using `frozenRows` and `frozenColumns` property inside `Sheet` property. In this sample, the first 3 rows and 2 columns are freezed using `frozenRows` and `frozenColumns` property. More information about freeze pane can be found in this documentation section.