def _map_arguments(self, args):
        """Map from the top-level arguments to the arguments provided to
        the indiviudal links """
        data = args.get('data')
        comp = args.get('comp')
        library = args.get('library')
        dry_run = args.get('dry_run', False)

        self._set_link('srcmaps-catalog', SrcmapsCatalog_SG,
                       comp=comp, data=data,
                       library=library,
                       nsrc=args.get('nsrc', 500),
                       dry_run=dry_run)

        self._set_link('gather-srcmaps', GatherSrcmaps_SG,
                       comp=comp, data=data,
                       library=library,
                       dry_run=dry_run)
        
        self._set_link('merge-srcmaps', MergeSrcmaps_SG,
                       comp=comp, data=data,
                       library=library,
                       dry_run=dry_run)
Map from the top-level arguments to the arguments provided to
        the indiviudal links