question: default B append8bit ( @ NotNull CharSequence cs , int start , int end ) throws IllegalArgumentException , BufferOverflowException , BufferUnderflowException , IndexOutOfBoundsException { if ( cs instanceof BytesStore ) { return write ( ( BytesStore ) cs , ( long ) start , end ) ; } for ( int i = start ; i < end ; i ++ ) { char c = cs . charAt ( i ) ; if ( c > 255 ) c = '?' ; writeByte ( ( byte ) c ) ; } return ( B ) this ; }
target:  Append a portion of a String to the Bytes in ISO-8859-1