import "time"

"foo": "bar": "str"

a: "B": 42

"a.b": "foo-": "cc_dd": x


a:
    b:
        c: 3

// references to bar are all shadowed and this can be safely turned into
// an identifier.
"bar": "str"

// These references would be directly referred to if turned into an identifier.
// The quotes should therefore not be removed.
"baz1": 3
"baz2": 3
"baz3": 3 // TODO: could be simplified.

// These string labels may be turned into an identifier.
"qux": 4
"quux": 5

// TODO(legacy): Don't simplify "hidden" fields for now.
"_foo": 3

x: {
    r1: baz1
    bar: r2: bar
    r3: bar
    E=quux: 3
    r4: quux
    [baz2="str"]: 4
    r5: baz2
    [baz3="bar"]: name: baz3 // TODO: treat baz3 as shadowed.
    "Time": time.Time
}