namedTypeSetBody

pub fn namedTypeSetBody(
    self: *Builder,
    named_type: Type,
    body_type: Type,
) void {
    const named_item = self.type_items.items[@intFromEnum(named_type)];
    self.type_extra.items[named_item.data + std.meta.fieldIndex(Type.NamedStructure, "body").?] =
        @intFromEnum(body_type);
}