Check things on a pathname. Is there anything? Is it a file? Is it writable? ...

• To check if a directory exists in your filesystem do this, return Boolean
  '/home/foo/foobar' asDirectoryEntry exists.
• To check if a file exists in your filesystem do this, return Boolean
  '/home/foo/abc.txt' asFileEntry exists.
• ATTENTION. unfortunately it sounds wrong, it should be maybe be 'doesExist' .