@SuppressWarnings("PMD.DefaultPackage")
    /* default */ ListOrderedMap<String, Section> getSections() {
        return sections;
    }
Return the map with all sections.
Should only be used by the library itself.

@return map with all sections
library/src/main/java/io/github/luizgrp/sectionedrecyclerviewadapter/SectionedRecyclerViewAdapter.java