
doc:   [
    DocGroup({"tag": "pre"}, [
        DocChars(" 8 v5 7h0T "), DocGroup({"client": "a", "tag": "caret"}, []),
        DocChars("d3m"), DocGroup({"tag": "caret", "client": "b"}, []),
        DocChars("J w ")
    ]),
    DocGroup({"tag": "pre"}, [
        DocChars("R"), DocGroup({"tag": "caret", "client": "c"}, [])
    ]),
    DocGroup({"tag": "pre"}, [
        DocChars("b18 6woP66\'s up with you?")
    ])
]

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

b_del: [
    DelWithGroup([
        DelSkip(11), DelWithGroup([]),
        DelSkip(3), DelWithGroup([]),
        DelSkip(4)
    ]),
    DelGroup([
        DelChars(1), DelGroup([])
    ]),
    DelGroup([
        DelChars(3), DelSkip(22)
    ])
]
b_add: [
    AddWithGroup([
        AddSkip(11), AddWithGroup([]),
        AddSkip(3), AddWithGroup([]),
        AddSkip(4)
    ]),
    AddGroup({"tag": "pre"}, [
        AddGroup({"tag": "caret", "client": "c"}, []),
        AddChars(" "), AddSkip(22)
    ])
]
