code: public List<MaterialSection> getSectionList() {
          List<MaterialSection> list = new LinkedList<>();
  
          for(MaterialSection section : sectionList)
              list.add(section);
  
          for(MaterialSection section : bottomSectionList)
              list.add(section);
  
          return list;
      }
docs: Get the section list
  
  N.B. The section list contains the bottom sections
  @return the list of sections setted