Adds the headline blocks
AbstractTrait
| Methods |
| protected consumeHeadline( $lines, $current) Consume lines for a headline |
| protected identifyHeadline( $line, $lines, $current) identify a line as a headline |
| protected abstract parseInline( $text) |
| protected abstract renderAbsy( $absy) |
| protected renderHeadline( $block) Renders a headline |