code: @Override
      public int print(
          ChronoDisplay formattable,
          Appendable buffer,
          AttributeQuery attributes,
          Set<ElementPosition> positions, // optional
          boolean quickPath
      ) throws IOException {
  
          if (this.attribute != null) {
              char literal = attributes.get(this.attribute, null).charValue();
              buffer.append(literal);
              return 1;
          } else if (this.multi == null) {
              buffer.append(this.single);
              return 1;
          } else {
              buffer.append(this.multi);
              return this.multi.length();
          }
  
      }
docs: ~ Methoden ----------------------------------------------------------