| detect.errors | Detect errors when invoking draw.io |
| drawio.default.path | Find the Drawio executable |
| drawio.engine | Drawio engine for knitr |
| get.os.type | Get (simplified) Operating System type |
| hook.cache | Hook function for caching drawio chunks |
| is.headless.env | Detect headless environments |
| parse.options | Parse Options |
| wrap.xvfb | Use a virtual display to run draw.io |
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