If the path path is a relative path, convert it to an absolute path
by interpreting it relative to this folder. If it is already an absolute
path, then don't change it.
Copy this resource to a child of the parentFolder with the same kind and
shortName as this resource. If this resource is a folder, then all of
the contents of the folder will be recursively copied.
Return a File representing a child Resource with the given
relPath. This call does not check whether a file with the given name
exists on the filesystem - client must call the File's exists getter
to determine whether the folder actually exists.
Return a Folder representing a child Resource with the given
relPath. This call does not check whether a folder with the given name
exists on the filesystem--client must call the Folder's exists getter
to determine whether the folder actually exists.