schema's `prefixItems` and `items` fields.
        In python's `typing.Tuple`, you can't specify a type for "extra" items -- they must all be the same type
        if the length is variable. So this field won't be set from a `typing.Tuple` annotation on a pydantic model.
    strict: The value must be a tuple with exactly this many items
    ref: optional unique identifier of the schema, used to reference the schema in other places
    metadata: Any other information you want to include with the schema, not used by pydantic-core
    serialization: Custom serialization schema
N)