question: append an optional parameter . concode_field_sep CapacityPolicy capacityPolicy concode_elem_sep byte[] bytes concode_elem_sep int bytesLength concode_elem_sep CapacityPolicy DEFAULT_CAPACITY_POLICY concode_field_sep int getCommandLengthValue concode_elem_sep int appendAll concode_elem_sep void normalizeCommandLength concode_elem_sep byte[] toBytes concode_elem_sep int getBytesLength
target: int function ( OptionalParameter arg0 ) { return append ( arg0 . serialize ( ) ) ; }