list [foo(bar=1), foo(bar=2), foo(bar=3)]
 key   0:4   ^--^                                       list
 key   6:9         ^-^                                  foo
 key  10:13            ^-^                              bar
 num  14:15                ^                            1
 val  14:15                ^                            1
pair  10:15            ^---^                            bar=1
 grp  10:15            ^---^                            bar=1
 val  10:15            ^---^                            bar=1
pair   6:15        ^-------^                            foo(bar=1
 key  18:21                    ^-^                      foo
 key  22:25                        ^-^                  bar
 num  26:27                            ^                2
 val  26:27                            ^                2
pair  22:27                        ^---^                bar=2
 grp  22:27                        ^---^                bar=2
 val  22:27                        ^---^                bar=2
pair  18:27                    ^-------^                foo(bar=2
 key  30:33                                ^-^          foo
 key  34:37                                    ^-^      bar
 num  38:39                                        ^    3
 val  38:39                                        ^    3
pair  34:39                                    ^---^    bar=3
 grp  34:39                                    ^---^    bar=3
 val  34:39                                    ^---^    bar=3
pair  30:39                                ^-------^    foo(bar=3
 grp   6:39        ^-------------------------------^    foo(bar=1), foo(bar=2), foo(bar=3
 val   6:39        ^-------------------------------^    foo(bar=1), foo(bar=2), foo(bar=3
pair   0:39  ^-------------------------------------^    list [foo(bar=1), foo(bar=2), foo(bar=3
msg         :list [foo(bar=1), foo(bar=2), foo(bar=3)]
format      :list [#)]
{
    "list": [
        {
            "foo": [
                {
                    "bar": 1
                }
            ]
        },
        {
            "foo": [
                {
                    "bar": 2
                }
            ]
        },
        {
            "foo": [
                {
                    "bar": 3
                }
            ]
        }
    ]
}