def add_search_engine(self, name, engine):
        if engine is None:
            self.search_engines.pop(name, None)
        self.search_engines[name] = engine
        return self
plots all collected dataframes and shows, if show=True
dataset/ETHPy150Open dossier/dossier.web/dossier/web/builder.py/WebBuilder.add_search_engine--crossover with--dataset/ETHPy150Open manahl/mdf/mdf/builders/basic.py/DataFrameBuilder.plot