def METHOD_NAME(
    self,
    metrics_df: pd.DataFrame,
    formula_images_rdd: pyspark.RDD,
    alpha_channel: np.ndarray,
    db: DB,
):
    """Store ion metrics and iso images.
    Args:
        metrics_df: formula, adduct, msm, fdr, individual metrics
        formula_images_rdd: collection of 2d intensity arrays (in coo_matrix format)
        alpha_channel: Image alpha channel (2D, 0..1)
        db: database connection
    """
    logger.info('Storing search results to the DB')
    ion_image_ids = self._post_images_to_image_store(
        formula_images_rdd, alpha_channel, self.n_peaks
    )
    self.store_ion_metrics(metrics_df, ion_image_ids, db)