removed sample from arrow.
re-roxygenised (ated?) docs with upgrade to roxygen
added stronger tests for checking R files and examples, added missing call handling to throw_arrow_warning,
added missing files
added stopgap to only let filename and code checking to run on my pc
remove use of hack to test if package directory exists.
corrected an example, and added example to xParamsOf
added examples, moved code inside conditional in failing file-exist file
removed (at)method tags to comply with new roxygen2 version
added examples
removed x() method from arrow, added test for use of sample in main functinos
tweaked examples.
added variadic
stopped using is.na, fixed build
made good progress on new forall tool
added more input validation
improved forall error message
improved the forall tool
added better handling of failed cases
added most of the new forall tools functionality