elementIf
fun LazyListScope.elementIf(condition: Boolean, identifier: Enum<*>, ifContent: @Composable LazyItemScope.() -> Unit, elseContent: @Composable LazyItemScope.() -> Unit)
fun LazyListScope.elementIf(condition: Boolean, key: Any, contentType: Any?, ifContent: @Composable LazyItemScope.() -> Unit, elseContent: @Composable LazyItemScope.() -> Unit)