from typing import TypedDict, Literal, TypeAlias

class Foo(TypedDict):
    kind: Literal["foo"]
    foo_value: int

class Bar(TypedDict):
    kind: Literal["bar"]
    bar_value: str

type FooBar = Foo | Bar

item: FooBar = {
    "kind": "|",
}

item: FooBar = {
    "kind": "foo",
    "|"
}