'Get the names of visualizations usable on the `target_object` and
the urls to call in order to render the visualizations.'

def get_visualizations(self, trans, target_object):

    applicable_visualizations = []
    for vis_name in self.plugins:
        url_data = self.get_visualization(trans, vis_name, target_object)
        if url_data:
            applicable_visualizations.append(url_data)
    return applicable_visualizations
