Set the base path of the script
set_script_path(path)character string containing the relative or absolute path to the
currently executing R code file, or NULL to reset the path.
box::set_script_path returns the previously set script path,
or NULL if none was explicitly set.
box needs to know the base path of the topmost calling R context (i.e.
the script) to find relative import locations. In most cases, box can
figure the path out automatically. However, in some cases third-party
packages load code in a way in which box cannot find the correct path
of the script any more. set_script_path can be used in these cases to
set the path of the currently executing R script manually.