pub fn rewrite_paths( result_map: CovResultMap, path_mapping: Option<Value>, source_dir: Option<&Path>, prefix_dir: Option<&Path>, ignore_not_existing: bool, to_ignore_dirs: &[impl AsRef<str>], to_keep_dirs: &[impl AsRef<str>], filter_option: Option<bool>, file_filter: FileFilter) -> CovResultIter