@mrclay The ImportProcessor works on a directory. The problem does not exist within a single file, it only occurs when concatenating multiple files together (hence why we need the preprocessor option in `Minify_CSS`). The actual `prependImportStatements` method is only an implementation of a specific custom preprocessor implementation being passed to `Minify_CSS` and thus, I guess, kind of a utility method, however instead of a single method in a utility class it could also be an implementation of a `Preprocessor` interface with one method if that is something you'd consider better style.