[CustomPropertyDrawer(typeof(CompositeAudioEvent.CompositeEntry))]
public class CompositeEntryDrawer : PropertyDrawer
{
    public override float GetPropertyHeight(SerializedProperty property, GUIContent label)
    {
        return 2 * EditorGUIUtility.singleLineHeight;
    }

    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label)
    {
        position.height = EditorGUIUtility.singleLineHeight;
        EditorGUI.PropertyField(position, property.FindPropertyRelative("Event"));

        position.y += position.height;
        EditorGUI.PropertyField(position, property.FindPropertyRelative("Weight"));
    }
}