
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "h2"}, [
            DocChars("J"), DocGroup({"client": "a", "tag": "caret"}, []),
            DocChars(" Af"), DocGroup({"client": "c", "tag": "caret"}, []),
            DocChars("T5 "), DocGroup({"tag": "caret", "client": "d"}, [])
        ]),
        DocGroup({"tag": "pre"}, [
            DocChars(" n hHello45"), DocGroup({"tag": "caret", "client": "b"}, []),
            DocChars("\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelGroup([
            DelChars(1), DelGroup([]),
            DelChars(2), DelSkip(6)
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddGroup({"tag": "h3"}, [
            AddChars(" k"), AddGroup({"client": "a", "tag": "caret"}, []),
            AddSkip(6)
        ])
    ])
]

b_del: [
    DelGroup([
        DelWithGroup([
            DelSkip(1), DelWithGroup([]),
            DelSkip(3), DelWithGroup([]),
            DelSkip(3), DelWithGroup([])
        ]),
        DelWithGroup([
            DelSkip(8), DelChars(3), DelGroup([])
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddSkip(1), AddWithGroup([]),
        AddSkip(3), AddWithGroup([]),
        AddSkip(3), AddWithGroup([])
    ]),
    AddWithGroup([
        AddSkip(8), AddGroup({"client": "b", "tag": "caret"}, []),
        AddChars("6")
    ])
]
