nl: add two durations . concode_field_sep long DURATION_SECONDS_MAX concode_elem_sep long DURATION_SECONDS_MIN concode_elem_sep Duration MAX_VALUE concode_elem_sep Duration MIN_VALUE concode_elem_sep Comparator<Duration> COMPARATOR concode_field_sep int compare concode_elem_sep Duration fromNanos concode_elem_sep boolean isValid concode_elem_sep boolean isValid concode_elem_sep Duration checkValid concode_elem_sep Duration subtract concode_elem_sep Duration parse concode_elem_sep long toSeconds concode_elem_sep Duration fromSeconds concode_elem_sep Comparator<Duration> comparator concode_elem_sep long toNanos concode_elem_sep Duration fromMillis concode_elem_sep Duration fromMicros concode_elem_sep String toString concode_elem_sep long toMillis concode_elem_sep long toMicros concode_elem_sep Duration normalizedDuration
code: Duration function ( Duration arg0 , Duration arg1 ) { checkValid ( arg0 ) ; checkValid ( arg1 ) ; return normalizedDuration ( checkedAdd ( arg0 . getSeconds ( ) , arg1 . getSeconds ( ) ) , checkedAdd ( arg0 . getNanos ( ) , arg1 . getNanos ( ) ) ) ; }