nl: cache the current display if it has not already been cached by the #launchapp method or a prior call to this method . concode_field_sep IUIContext _ui concode_elem_sep Display _display concode_elem_sep Shell _rootShell concode_field_sep IUIContext getUI concode_elem_sep IUIContext createUI concode_elem_sep void setDisplay concode_elem_sep void update concode_elem_sep Shell getRootShell concode_elem_sep void cacheRootShell concode_elem_sep void setRootShell concode_elem_sep Display getDisplay
code: void function ( ) { if ( _display == null ) setDisplay ( Display . getDefault ( ) ) ; }