How to use the gtdbtk.biolib_lite.common.check_dir_exists function in gtdbtk

def identify(self, options):
        """Identify marker genes in genomes.

        Parameters
        ----------
        options : argparse.Namespace
            The CLI arguments input by the user.
        """

        if options.genome_dir:
            check_dir_exists(options.genome_dir)

        if options.batchfile:
            check_file_exists(options.batchfile)

        make_sure_path_exists(options.out_dir)

        genomes, tln_tables = self._genomes_to_process(
            options.genome_dir, options.batchfile, options.extension)
        self.genomes_to_process = genomes

        markers = Markers(options.cpus)
        markers.identify(genomes,
                         tln_tables,
                         options.out_dir,
                         options.prefix,
                         options.force)

def classify(self, options):
        """Determine taxonomic classification of genomes.

        Parameters
        ----------
        options : argparse.Namespace
            The CLI arguments input by the user.
        """

        # See ticket #255... perhaps an upstream version/OS issue?
        if not hasattr(options, 'pplacer_cpus'):
            options.pplacer_cpus = None

        check_dir_exists(options.align_dir)
        make_sure_path_exists(options.out_dir)
        if options.scratch_dir:
            make_sure_path_exists(options.scratch_dir)

        genomes, _ = self._genomes_to_process(
            options.genome_dir, options.batchfile, options.extension)

        classify = Classify(options.cpus, options.pplacer_cpus)
        classify.run(genomes,
                     options.align_dir,
                     options.out_dir,
                     options.prefix,
                     options.scratch_dir,
                     options.recalculate_red,
                     options.debug,
                     options.split_tree)

def align(self, options):
        """Create MSA from marker genes.

        Parameters
        ----------
        options : argparse.Namespace
            The CLI arguments input by the user.
        """

        check_dir_exists(options.identify_dir)
        make_sure_path_exists(options.out_dir)

        if not hasattr(options, 'outgroup_taxon'):
            options.outgroup_taxon = None

        markers = Markers(options.cpus, options.debug)
        markers.align(options.identify_dir,
                      options.skip_gtdb_refs,
                      options.taxa_filter,
                      options.min_perc_aa,
                      options.custom_msa_filters,
                      options.skip_trimming,
                      options.rnd_seed,
                      options.cols_per_gene,
                      options.min_consensus,
                      options.max_consensus,