fn sendMessage(io: Io, file: Io.File, tag: std.zig.Client.Message.Tag) !void
fn sendMessage(io: Io, file: Io.File, tag: std.zig.Client.Message.Tag) !void { const header: std.zig.Client.Message.Header = .{ .tag = tag, .bytes_len = 0, }; var w = file.writerStreaming(io, &.{}); w.interface.writeStruct(header, .little) catch |err| switch (err) { error.WriteFailed => return w.err.?, }; }