Closes all the windows owned by the document, then removes itself from the list of documents known by the NSDocumentController. This method does not ask the user if they want to save the document before closing. It is closed without saving any information.
Initialises the receiver with the contents of the document at fileName assuming that the type of data is as specified by fileType. Destroys the receiver and returns nil on failure.
Initialises the receiver with the contents of the document at url assuming that the type of data is as specified by fileType. Destroys the receiver and returns nil on failure.
Makes all the documents windows visible by ordering them to the front and making them main or key. If the document has no windows, this method has no effect.