def extendMarkdown(self, md, md_globals):

        md.preprocessors.add('fenced_code_block', 
                                 FencedBlockPreprocessor(md), 
                                 "_begin")
Tests scenario where we merely reassociate a stage to a pre-existing
dataset/ETHPy150Open natestedman/Observatory/observatory/lib/markdown/extensions/fenced_code.py/FencedCodeExtension.extendMarkdown--crossover with--dataset/ETHPy150Open saltstack/salt/tests/unit/states/boto_apigateway_test.py/BotoApiGatewayTestCase.test_present_when_stage_exists_and_is_to_associate_to_existing_deployment