def clone_source_dir(source_dir, dest_dir):
if os.path.isdir(dest_dir):<EOL><INDENT>print('<STR_LIT>', dest_dir)<EOL>shutil.rmtree(dest_dir)<EOL><DEDENT>shutil.copytree(source_dir, dest_dir)<EOL>
Copies the source Protobuf files into a build directory.

    Args:
        source_dir (str): source directory of the Protobuf files
        dest_dir (str): destination directory of the Protobuf files