| add() | Adds a new empty sheet to the spreadsheet and returns the unique identifier of the newly created sheet |
| clear() | Clears the content of a specific sheet (removes all cell values, styles, and formatting) without deleting the sheet itself |
| get() | Returns a single sheet object by its identifier |
| getActive() | Returns the sheet object that is currently active (visible) in the spreadsheet |
| getAll() | Returns an array of all sheet objects currently present in the spreadsheet |
| remove() | Removes a sheet from the spreadsheet by its identifier |
| setActive() | Switches the active (visible) sheet to the one specified by its identifier |