code: FormatStep markLastOrBlock(int lastOrBlockIndex) {
  
          if (!this.orMarker) {
              throw new IllegalStateException("This step is not starting an or-block.");
          }
  
          return new FormatStep(
              this.processor,
              this.level,
              this.section,
              this.sectionalAttrs,
              this.fullAttrs,
              this.reserved,
              this.padLeft,
              this.padRight,
              true,
              lastOrBlockIndex
          );
  
      }
docs: <p>Markiert den letzten oder-Block des aktuellen Abschnitts. </p>
  
  @param   lastOrBlockIndex    index of last or-block in current section
  @return  updated format step
  @throws  IllegalStateException if called for a non-starting or-block
  @since   3.16/4.13