Returns the clipboard object for the given selection. See Clipboard.getForDisplay for complete details.
a gdk.Atom which identifies the clipboard to use
the appropriate clipboard object. If no clipboard already exists, a new one will be created. Once a clipboard object has been created, it is persistent and, since it is owned by GTK+, must not be freed or unreffed.
Returns the clipboard object for the given selection. See Clipboard.getForDisplay for complete details.