def METHOD_NAME(self):
    self.data.tl.find_marker_genes(cluster_res_key='leiden', sort_by="log2fc", n_genes='auto',
                                   output=TEST_DATA_PATH + "marker_genes4.csv")
    self.data.tl.filter_marker_genes(min_fold_change=1, min_in_group_fraction=0.001, max_out_group_fraction=0.1,
                                     output=TEST_DATA_PATH + "filter_genes4.csv")
    self.data.plt.marker_gene_volcano(group_name='2.vs.rest', vlines=False,
                                      out_path=TEST_IMAGE_PATH + "marker_gene_volcano_filtered.png")