div-heading-paragraph.java

public Body div() {
  divs.add(Div.create(this));
  return this;
}

public Body heading(Heading.Level level, String content) {
  Heading heading = Heading.create(level, content, this);
  headers.get(level).add(heading);
  return this;
}

public Body paragraph(String content) {
  paragraphs.add(content);
  return this;
}