import { CssSyntaxError } from "https://deno.land/x/postcss@8.4.16/lib/postcss.d.ts";
Returns a few lines of CSS source that caused the error.
If the CSS has an input source map without sourceContent
,
this method will return an empty string.
error.showSourceCode() //=> " 4 | }
// 5 | a {
// > 6 | bad
// | ^
// 7 | }
// 8 | b {"