Function
LazyLayoutKeyIndexMap
Common
```kotlin
fun LazyLayoutKeyIndexMap(
itemIndexRange: IntRange,
intervalContent: LazyLayoutIntervalContent<*>,
): LazyLayoutKeyIndexMap
```
A `LazyLayoutKeyIndexMap` that keeps a mapping over given `IntRange` of items. Items outside of
given range are considered unknown, with null returned as the index.
#### Parameters
| | |
| --- | --- |
| itemIndexRange | Range of items to keep track of. |
| intervalContent | Source of item information in the form of `LazyLayoutIntervalContent`. |