Add missing preview.

libraries/designsystem/src/main/kotlin/io/element/android/libraries/designsystem/atomic/molecules/IconTitlePlaceholdersRowMolecule.kt

@@ -30,6 +30,9 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.unit.Dp
 import androidx.compose.ui.unit.dp
 import io.element.android.libraries.designsystem.atomic.atoms.PlaceholderAtom
+import io.element.android.libraries.designsystem.components.avatar.AvatarSize
+import io.element.android.libraries.designsystem.preview.DayNightPreviews
+import io.element.android.libraries.designsystem.preview.ElementPreview
 import io.element.android.libraries.designsystem.theme.placeholderBackground
 import io.element.android.libraries.theme.ElementTheme
 
@@ -57,3 +60,11 @@ fun IconTitlePlaceholdersRowMolecule(
         PlaceholderAtom(width = 45.dp, height = 7.dp)
     }
 }
+
+@DayNightPreviews
+@Composable
+internal fun IconTitlePlaceholdersRowMoleculePreview() = ElementPreview {
+    IconTitlePlaceholdersRowMolecule(
+        iconSize = AvatarSize.TimelineRoom.dp,
+    )
+}