function_graph_single: Show all package functions that are called from a given...
In rich-iannone/pkgattrs: Generate Information Summaries on R Packages

Create a DiagrammeR graph that contains nodes of the type function and edges that have the relationship called_in.

1	function_graph_single(pkgattrs_tbl, target_fn, pkg_name = NULL)

`pkgattrs_tbl`	A tibble object that contains package function information. This is created by the `pkgattrs()` function.
`target_fn`	the name of the function that is to be examined for its calls of package functions.
`pkg_name`	An optional package name for filtering the tibble provided to `pkgattrs_tbl`, which is useful if that tibble describes multiple packages.