question: get the time in millis passed since a previous time concode_field_sep long nanosPerMilli concode_field_sep long nanoTime concode_elem_sep long millisToNanos concode_elem_sep long timeSinceNanos concode_elem_sep long millis concode_elem_sep long nanosToMillis
target: long function ( long arg0 ) { return millis ( ) - arg0 ; }