def extendMarkdown(self, md, md_globals):

        md.preprocessors.add("meta", MetaPreprocessor(md), "_begin")
Add MetaPreprocessor to Markdown instance.
dataset/ETHPy150Open timonwong/OmniMarkupPreviewer/OmniMarkupLib/Renderers/libs/markdown/extensions/meta.py/MetaExtension.extendMarkdown