## RevisionLogCollection class

Represents all revision logs.

## Methods

| Name | Description |
| --- | --- |
| [add()](#add) | Reserved for internal use. |
| [clear()](#clear) |  |
| [contains()](#contains) | Reserved for internal use. |
| [get(index)](#get) | Gets RevisionLog by index. |
| [get()](#get-1) | Reserved for internal use. |
| [getCount()](#getcount) |  |
| [getDaysPreservingHistory()](#getdayspreservinghistory) | Gets and sets the number of days the spreadsheet application will keep the change history for this workbook. |
| [highlightChanges(options)](#highlightchanges) | Highlights changes of shared workbook. |
| [indexOf()](#indexof) | Reserved for internal use. |
| [iterator()](#iterator) |  |
| [removeAt()](#removeat) |  |
| [setDaysPreservingHistory()](#setdayspreservinghistory) | Gets and sets the number of days the spreadsheet application will keep the change history for this workbook. |

### add() {#add}

Reserved for internal use.

### clear() {#clear}

### contains() {#contains}

Reserved for internal use.

### get(index) {#get}

Gets RevisionLog by index.

| Parameter | Type | Description |
| --- | --- | --- |
| index | Number | The index. |

**Returns:** RevisionLog — `RevisionLog` Returns RevisionLog object.

### get() {#get-1}

Reserved for internal use.

### getCount() {#getcount}

### getDaysPreservingHistory() {#getdayspreservinghistory}

Gets and sets the number of days the spreadsheet application will keep the change history for this workbook.

### highlightChanges(options) {#highlightchanges}

Highlights changes of shared workbook.

| Parameter | Type | Description |
| --- | --- | --- |
| options | HighlightChangesOptions | Set the options for filtering which changes should be tracked. |

### indexOf() {#indexof}

Reserved for internal use.

### iterator() {#iterator}

### removeAt() {#removeat}

### setDaysPreservingHistory() {#setdayspreservinghistory}

Gets and sets the number of days the spreadsheet application will keep the change history for this workbook.