def download_fastqc_reports(self,download_dir):
if not os.path.isdir(download_dir):<EOL><INDENT>os.makedirs(download_dir)  <EOL><DEDENT>msg = "<STR_LIT>".format(download_dir=download_dir)<EOL>debug_logger.debug("<STR_LIT>" + msg)<EOL>dxpy.download_folder(project=self.dx_project_id,destdir=download_dir,folder=self.DX_FASTQC_FOLDER,overwrite=True)<EOL>success_logger.info("<STR_LIT>" + msg)<EOL>return download_dir<EOL>
Downloads the QC report from the DNAnexus sequencing results project.

Args: 
    download_dir: `str` - The local directory path to download the QC report to.

Returns: 
    `str`. The filepath to the downloaded FASTQC reports folder.