
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h2"}, [
            DocChars(" "), DocGroup({"tag": "caret", "client": "b"}, [])
        ]),
        DocGroup({"tag": "h2"}, [
            DocChars("7"), DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("nkHCht2"), DocGroup({"client": "a", "tag": "caret"}, [])
        ])
    ]),
    DocGroup({"tag": "p"}, [
        DocChars("5 o What\'s up with you?")
    ])
]

a_del: [
    DelGroup([
        DelWithGroup([
            DelSkip(1), DelWithGroup([])
        ]),
        DelWithGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(5), DelChars(2), DelGroup([])
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddSkip(1), AddWithGroup([])
    ]),
    AddWithGroup([
        AddSkip(1), AddWithGroup([]),
        AddSkip(5), AddGroup({"tag": "caret", "client": "a"}, []),
        AddChars("E")
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelChars(1), DelGroup([])
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([
            AddGroup({"client": "b", "tag": "caret"}, []),
            AddChars("r")
        ])
    ])
]
