---
title: "TransformingLazyColumnScope"
description: "Receiver scope which is used by [TransformingLazyColumn]."
type: "interface"
---

<div class='type'>Interface</div>


<a id='references'></a>

<div class='sourceset sourceset-android'>Android</div>



```kotlin
@TransformingLazyColumnScopeMarker
public sealed interface TransformingLazyColumnScope
```


Receiver scope which is used by `TransformingLazyColumn`.


## Functions

```kotlin
public fun items(
        count: Int,
        key: ((index: Int) -> Any)? = null,
        contentType: (index: Int) -> Any? = { null },
        content: @Composable TransformingLazyColumnItemScope.(index: Int) -> Unit,
    )
```


Adds `count` items.

#### Parameters

| | |
| --- | --- |
| count | The number of items to add to the `TransformingLazyColumn`. |
| key | A factory of stable and unique keys representing the item. Using the same key for multiple items in the `TransformingLazyColumn` is not allowed. |
| contentType | A factory of the content types for the item. The item compositions of the same type could be reused more efficiently. Note that null is a valid type and items of such type will be considered compatible. |
| content | The content displayed by a single item. |



```kotlin
public fun item(
        key: Any? = null,
        contentType: Any? = null,
        content: @Composable TransformingLazyColumnItemScope.() -> Unit,
    )
```


Adds a single item.

#### Parameters

| | |
| --- | --- |
| key | A stable and unique key representing the item. Using the same key for multiple items in the `TransformingLazyColumn` is not allowed. Type of the key should be saveable via Bundle on Android. If null is passed the position in the `TransformingLazyColumn` will represent the key. When you specify the key the scroll position will be maintained based on the key, which means if you add/remove items before the current visible item the item with the given key will be kept as the first visible one. |
| contentType | The type of the content of this item. The item compositions of the same type could be reused more efficiently. Note that null is a valid type and items of such type will be considered compatible. |
| content | The content of the item. |