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I noticed the /index.Rmd R blogdown file contains three colons ::: instead of the two :: I'm used to seeing (eg dplyr::filter).

---
site: blogdown:::blogdown_site
---

Why the three semicolons? And why doesn't ?blogdown::blogdown_site or ?blogdown:::blogdown_site come up with anything?

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    Did you take a look at the R documentation: [Double Colon and Triple Colon Operators](https://stat.ethz.ch/R-manual/R-devel/library/base/html/ns-dblcolon.html)? – Maurits Evers Mar 21 '19 at 23:52
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    ::: is used to access a non exported function. – Elin Mar 21 '19 at 23:52

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