def _build_package_finder(self, options, index_urls, session):
        return PackageFinder(
            find_links=options.find_links,
            format_control=options.format_control,
            index_urls=index_urls,
            allow_external=options.allow_external,
            allow_unverified=options.allow_unverified,
            allow_all_external=options.allow_all_external,
            trusted_hosts=options.trusted_hosts,
            allow_all_prereleases=options.pre,
            process_dependency_links=options.process_dependency_links,
            session=session,
        )
Returns first defined occurence of the following: 
dataset/ETHPy150Open francelabs/datafari/windows/python/Lib/site-packages/pip/commands/install.py/InstallCommand._build_package_finder--crossover with--dataset/ETHPy150Open statesofpop/django-cal/django_cal/views.py/Events.__get_dynamic_attr