code: public <FT> CsvProcessor<T> withConverter(Class<FT> clazz, Converter<FT, ?> converter) {
  		converterMap.put(clazz, converter);
  		return this;
  	}
docs: Register a converter class for all instances of the class argument. The converter can also be specified with the
  {@link CsvColumn#converterClass()} annotation field. Alternative way to do
  {@link #registerConverter(Class, Converter)}.