item to expand
Cases when you'd want to return the output of readData(publish()): when the context for rendering a mustache template includes named viz items whose contents we want to include. For example: a page section's template has a text-before field, and the context for that section includes 'text-before: page_text.section3_text_before', and section3_text_before is a named item in page_text.yaml.
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