format

        pub fn format(p: Prefixed, w: *Writer) Writer.Error!void {
            switch (p.thread_local) {
                .default => return,
                .generaldynamic => {
                    var vecs: [2][]const u8 = .{ p.prefix, "thread_local" };
                    return w.writeVecAll(&vecs);
                },
                else => {
                    var vecs: [4][]const u8 = .{ p.prefix, "thread_local(", @tagName(p.thread_local), ")" };
                    return w.writeVecAll(&vecs);
                },
            }
        }