Method __or__

src/werkzeug/datastructures/headers.py:535–546

(
        self,
        other: cabc.Mapping[
            str, t.Any | list[t.Any] | tuple[t.Any, ...] | cabc.Set[t.Any]
        ],
    )

                self.set(key, value)

    def __or__(
        self,
        other: cabc.Mapping[
            str, t.Any | list[t.Any] | tuple[t.Any, ...] | cabc.Set[t.Any]
        ],
    ) -> te.Self:
        if not isinstance(other, cabc.Mapping):
            return NotImplemented

        rv = self.copy()
        rv.update(other)
        return rv

    def __ior__(
        self,