a = Foo("a": 4, "z": 2, [b, z], "hello, world", c)

Foo(a, b)

Foo(
    a,
    [b, c],
    d
)

Foo(
    a,
    [b, "c"],
    d
)

Foo(
    a,
    [b, c],
    d
)

Foo(
    a,
    [b, c],
    d
)