cache size = 0
[9] Window Init (draw/0)
    [10] Box Init (compute_required_size/0)
        [11] Text A Init (compute_required_size/0)
        [11] Text A Required_Size (compute_required_size/1)
        [12] Text B Init (compute_required_size/0)
        [12] Text B Required_Size (compute_required_size/1)
    [10] Box Required_Size (compute_required_size/1)
[9] Window Children_Allocated_Size_And_Pre_Drawing (draw/1)
    [10] Box Init (draw/0)
        [11] Text A Init (compute_required_size/0)
        [11] Text A Required_Size (compute_required_size/1)
        [12] Text B Init (compute_required_size/0)
        [12] Text B Required_Size (compute_required_size/1)
    [10] Box Children_Allocated_Size_And_Pre_Drawing (draw/1)
        [11] Text A Init (draw/0)
        [11] Text A Children_Allocated_Size_And_Pre_Drawing (draw/1)
        [11] Text A Post_Drawing (draw/2)
        [12] Text B Init (draw/0)
        [12] Text B Children_Allocated_Size_And_Pre_Drawing (draw/1)
        [12] Text B Post_Drawing (draw/2)
    [10] Box Post_Drawing (draw/2)
[9] Window Post_Drawing (draw/2)
