def extendMarkdown(self, md, md_globals):

        md.preprocessors.add("meta", MetaPreprocessor(md), "_begin")
Return the size and options of the thumbnail that should be inserted
dataset/ETHPy150Open timonwong/OmniMarkupPreviewer/OmniMarkupLib/Renderers/libs/markdown/extensions/meta.py/MetaExtension.extendMarkdown--crossover with--dataset/ETHPy150Open divio/cmsplugin-filer/cmsplugin_filer_teaser/cms_plugins.py/FilerTeaserPlugin._get_thumbnail_options