public void append(final Object value){
  if (needsComma) {
    sb.append(m_separator);
  }
  needsComma=true;
  sb.append(value);
}

public void append ( final Object value ) { if ( needsComma ) { sb . append ( m_separator ) ; } needsComma = true ; sb . append ( value ) ; }
appends a new value to the commafied list .
