Chapter constructor
Implementation
Chapter(String book, this.chapterNumber)
: reference = Librarian.createReferenceString(book, chapterNumber),
referenceType = ReferenceType.CHAPTER,
startVerseNumber = 1,
startVerse = Verse(book, chapterNumber, 1),
endVerse = Librarian.getLastVerse(book, chapterNumber),
endVerseNumber = Librarian.getLastVerseNumber(book, chapterNumber),
isValid = Librarian.verifyReference(book, chapterNumber),
super(book);