nl: sets the preferred difficulty for this user and overwrites any previous preference . concode_field_sep String SIZE concode_elem_sep String LIBRARY_LOCATION concode_elem_sep String DIFFICULTY concode_field_sep void setPreferredSize concode_elem_sep void clearPreferences concode_elem_sep Integer getPreferredSize concode_elem_sep String getPuzzleLibraryLocation concode_elem_sep Difficulty getPreferredDifficulty concode_elem_sep void setPuzzleLibraryLocation
code: void function ( Difficulty arg0 ) { Preferences loc0 = Preferences . userNodeForPackage ( this . getClass ( ) ) ; loc0 . putInt ( DIFFICULTY , arg0 . toInt ( ) ) ; }