ModifierCenterInParent.kt

public fun Modifier.centerInParent(): Modifier =
    this then layout { measurable, constraints ->
        val maxWidthAllowedByParent = constraints.maxWidth
        val maxHeightAllowedByTheParent = constraints.maxHeight
        val placeable = measurable.measure(constraints)
        val start = maxWidthAllowedByParent / 2 - placeable.width / 2
        val top = maxHeightAllowedByTheParent / 2 - placeable.height / 2
        layout(width = placeable.width, height = placeable.height) {
            placeable.placeRelative(x = start, y = top)
        }
    }