1<===> README.md 2`@forward` should handle extensions in the same way as `@use`, and as such 3should produce the same errors when extensions fail. We assume that they use 4shared infrastructure, though, and as such only test a basic case. 5 6<===> input.scss 7@use "midstream"; 8 9in-input {a: b} 10 11<===> _midstream.scss 12@forward "upstream"; 13 14<===> _upstream.scss 15in-upstream {@extend in-input} 16 17<===> error 18Error: The target selector was not found. 19Use "@extend in-input !optional" to avoid this error. 20 , 211 | in-upstream {@extend in-input} 22 | ^^^^^^^^^^^^^^^^ 23 ' 24 _upstream.scss 1:14 root stylesheet 25