Abs returns an absolute representation of path.

Base returns the last element of path.

Clean returns the shortest path name equivalent to path by purely lexical processing.

Dir returns all but the last element of path, typically the path's directory.

Ext returns the file name extension used by path.

Glob returns the names of all files matching pattern or nil if there is no matching file.

IsAbs reports whether the path is absolute.

Join joins any number of path elements into a single path, adding a Separator if necessary.

LoadModule loads the os module.

Rel returns a relative path that is lexically equivalent to targpath when joined to basepath with an intervening separator.

ModuleName defines the expected name for this Module when used in starlark's load() function, eg: load('io/ioutil', 'json').