| output_metadata | R Documentation | 
This object provides a mechanism for users to attach metadata as an attribute
(named rmd_output_metadata) of the returned value of
render(). The initial value of the metadata comes from in the
rmd_output_metadata field of the YAML frontmatter of an R Markdown
document. The metadata can be queried via the
output_metadata$get() method, and modified via the
output_metadata$set() method.
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