code: private void processNestedComment() {
          int nestedCommentsAmount = 1; // Starting with just the initial comment.
          while (templateReader.hasNextCharacter()) {
              final char commentCharacter = templateReader.nextCharacter();
              if (isCommentClosingMarker(commentCharacter) && templateReader.hasNextCharacter()
                      && templateReader.peekCharacter() == syntax.getTagClosing()) {
                  // Character was a comment closing sign and the next tag closed the comment.
                  templateReader.nextCharacter(); // Polling tag closing.
                  if (--nestedCommentsAmount == 0) {
                      // All comments ended. Returning.
                      break;
                  }
              }
              if (commentCharacter == syntax.getTagOpening() && templateReader.hasNextCharacter()
                      && isCommentOpeningMarker(templateReader.peekCharacter())) {
                  // Another comment was opened inside the currently parsed one.
                  templateReader.nextCharacter(); // Polling comment opening marker.
                  nestedCommentsAmount++;
              }
          }
      }
docs: Found an open tag starting with comment sign and nested comments are on. Burning through characters up to the
  comment's end, honoring nested, commented-out comments.