toWip

    pub fn toWip(self: FunctionAttributes, builder: *const Builder) Allocator.Error!Wip {
        var wip: Wip = .{};
        errdefer wip.deinit(builder);
        const attributes_slice = self.slice(builder);
        try wip.maps.ensureTotalCapacityPrecise(builder.gpa, attributes_slice.len);
        for (attributes_slice) |attributes| {
            const map = wip.maps.addOneAssumeCapacity();
            map.* = .{};
            const attribute_slice = attributes.slice(builder);
            try map.ensureTotalCapacity(builder.gpa, attribute_slice.len);
            for (attributes.slice(builder)) |attribute|
                map.putAssumeCapacityNoClobber(attribute.getKind(builder), attribute);
        }
        return wip;
    }