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| callFun | Call an RStudio API function |
| findFun | Exists/get for RStudio functions |
| getVersion | Return the current version of the RStudio API |
| hasFun | Exists/get for RStudio functions |
| isAvailable | Check if RStudio is running. |
| previewRd | Preview an Rd topic in the Help pane |
| verifyAvailable | Check if RStudio is running. |
| versionInfo | RStudio Version Information |
| viewer | View local web content within RStudio |