private void OnEnable()
    {
        m_Target = target as Ladder;

        m_RestrictedArea             = serializedObject.FindProperty("m_RestrictedArea");
        m_HasRestrictedArea          = serializedObject.FindProperty("m_HasRestrictedArea");
        m_IsRestrictedAreaTopIgnored = serializedObject.FindProperty("m_IsRestrictedAreaTopIgnored");
        m_TopAreaHeight    = serializedObject.FindProperty("m_TopAreaHeight");
        m_BottomAreaHeight = serializedObject.FindProperty("m_BottomAreaHeight");

        m_ChildCollider = new List <BoxCollider2D>(m_Target.GetComponentsInChildren <BoxCollider2D>());
    }