https://forum.dlang.org/post/ypxsqtddxvdxunsoluas@forum.dlang.org https://dlang.org/changelog/2.079.0.html#default_after_variadic
https://doc.rust-lang.org/std/macro.dbg.html
https://blog.rust-lang.org/2019/01/17/Rust-1.32.0.html#the-dbg-macro
https://forum.dlang.org/post/svjjawiezudnugdyriig@forum.dlang.org http://forum.dlang.org/thread/yczwqrbkxdiqijtiynrh@forum.dlang.org?page=1
Debug print args followed by a newline.