
doc:   [
    DocGroup({"tag": "h1"}, [
        DocGroup({"client": "b", "tag": "caret"}, []),
        DocChars("   f"), DocGroup({"client": "c", "tag": "caret"}, []),
        DocChars("25 h8Gv8a")
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h1"}, [
            DocChars("O"), DocGroup({"tag": "caret", "client": "a"}, []),
            DocChars("Al jxG  0l 1at\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([]),
        DelSkip(4), DelWithGroup([]),
        DelSkip(9)
    ]),
    DelGroup([
        DelWithGroup([
            DelSkip(1), DelGroup([])
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([]),
        AddSkip(4), AddWithGroup([]),
        AddSkip(9)
    ]),
    AddWithGroup([
        AddGroup({"tag": "caret", "client": "a"}, []),
        AddSkip(1)
    ])
]

b_del: [
    DelWithGroup([
        DelGroup([]),
        DelChars(1), DelSkip(3), DelWithGroup([]),
        DelSkip(9)
    ]),
    DelWithGroup([])
]
b_add: [
    AddGroup({"tag": "bullet"}, [
        AddWithGroup([
            AddChars("6a"), AddSkip(3), AddWithGroup([]),
            AddSkip(9)
        ])
    ]),
    AddWithGroup([
        AddWithGroup([
            AddGroup({"tag": "caret", "client": "b"}, [])
        ])
    ])
]
