boolean function ( ) { return ( fStack . size ( ) > 0 ) ; }
returns true if `` go home '' is possible . this is only true if the stack size is greater than 0 . concode_field_sep Stack fStack concode_field_sep DrillFrame add concode_elem_sep DrillFrame goBack concode_elem_sep int size concode_elem_sep DrillFrame top concode_elem_sep boolean canGoBack concode_elem_sep DrillFrame goHome concode_elem_sep void reset