def extendMarkdown(self, md, md_globals):
        md.preprocessors.add('abbr', AbbrPreprocessor(md), '<reference')
Inserts a child into the object's children.
dataset/ETHPy150Open natestedman/Observatory/observatory/lib/markdown/extensions/abbr.py/AbbrExtension.extendMarkdown--crossover with--dataset/ETHPy150Open enthought/mayavi/mayavi/core/base.py/Base.tno_insert_child