This interface is implemented according to the specification of
service Content.
An object representing a directory in the file system is able
to create a new object, which in turn can become the representation
of a physical file/directory being contained in the initial directory.
The precise way is the following:
Let the parent folder create a new content by calling
XContentCreator::createNewContent on it. The content
type to use for new directories is
"application/vnd.sun.staroffice.fsys-folder". To create a new file
use the type "application/vnd.sun.staroffice.fsys-file".
As return value you get a new file content object.
Set a title at the new object by letting it execute
the command "setPropertyValues", which sets at least the property
"Title" to a non-empty value ).
Let the new object ( not the parent! ) execute the command "insert".
This will create the corresponding physical file or directory.
For files, you need to supply the implementation of
an ::com::sun::star::io::XInputStream with the
command's parameters, that provides access to the stream data.
