Closes the project with the option of saving changes automatically, prompting the user to save changes or closing without saving changes.
closeOptions Action to be performed on close. A Clos eOp t ions enumerated value, one of:
CloseOptions.DO_NOT_SAVE_CHANGES : Close without saving.
CloseOptions.PROMPT_TO_SAVE_CHANGES : Prompt for whether to save changes before close.
CloseOptions.SAVE_CHANGES: Save automatically on close.
Boolean. True on success. False if the file has not been previously saved, the user is prompted, and the user cancels the save.