
doc:   [
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "p"}, [
            DocChars(" v e")
        ]),
        DocGroup({"tag": "p"}, [
            DocChars("UF ello worl"), DocGroup({"client": "a", "tag": "caret"}, [])
        ])
    ]),
    DocGroup({"tag": "bullet"}, [
        DocGroup({"tag": "p"}, [
            DocGroup({"client": "b", "tag": "caret"}, []),
            DocChars(" xU What\'s up with you?")
        ])
    ])
]

a_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(4)
        ]),
        DelGroup([
            DelSkip(7), DelChars(1), DelSkip(1), DelChars(3), DelGroup([])
        ])
    ]),
    DelGroup([
        DelWithGroup([
            DelWithGroup([]),
            DelSkip(1), DelChars(1)
        ])
    ])
]
a_add: [
    AddWithGroup([
        AddWithGroup([
            AddSkip(4)
        ]),
        AddGroup({"tag": "p"}, [
            AddSkip(7), AddChars("D"), AddGroup({"client": "a", "tag": "caret"}, []),
            AddSkip(1), AddChars("P")
        ])
    ]),
    AddWithGroup([
        AddChars("2"), AddWithGroup([]),
        AddSkip(1), AddChars(" 4")
    ])
]

b_del: [
    DelWithGroup([
        DelWithGroup([
            DelSkip(4)
        ]),
        DelWithGroup([
            DelSkip(12), DelWithGroup([])
        ])
    ]),
    DelWithGroup([
        DelGroup([
            DelGroup([]),
            DelChars(5), DelSkip(18)
        ])
    ])
]
b_add: [
    AddWithGroup([
        AddWithGroup([
            AddSkip(4)
        ]),
        AddWithGroup([
            AddSkip(12), AddWithGroup([])
        ])
    ]),
    AddWithGroup([
        AddGroup({"tag": "h1"}, [
            AddChars("l2"), AddGroup({"client": "b", "tag": "caret"}, []),
            AddSkip(18)
        ])
    ])
]
