handy method to find a certain pattern into a file . while this method lives in the fileutils , it was designed with with unit test in mind to check result redirected into a file concode_field_sep PlaceHolder placeHolder concode_field_sep String getFileNameWithoutExtension concode_elem_sep String readFilelist concode_elem_sep String normalizeFilename concode_elem_sep List<DataSource> collectFiles concode_elem_sep List<DataSource> collect