def add_showcases(self, showcases, showcases_to_check=None):
        # type: (List[Union[hdx.data.showcase.Showcase,Dict,str]], List[hdx.data.showcase.Showcase]) -> bool
        """Add dataset to multiple showcases

        Args:
            showcases (List[Union[Showcase,Dict,str]]): A list of either showcase ids or showcase metadata from Showcase objects or dictionaries
            showcases_to_check (List[Showcase]): list of showcases against which to check existence of showcase. Defaults to showcases containing dataset.

        Returns:
            bool: True if all showcases added or False if any already present
        """
        if showcases_to_check is None:
            showcases_to_check = self.get_showcases()
        allshowcasesadded = True
        for showcase in showcases:
            if not self.add_showcase(showcase, showcases_to_check=showcases_to_check):
                allshowcasesadded = False
        return allshowcasesadded
Add dataset to multiple showcases

        Args:
            showcases (List[Union[Showcase,Dict,str]]): A list of either showcase ids or showcase metadata from Showcase objects or dictionaries
            showcases_to_check (List[Showcase]): list of showcases against which to check existence of showcase. Defaults to showcases containing dataset.

        Returns:
            bool: True if all showcases added or False if any already present