DOCUMENTS: Implement getters for the SubAssDocument

src/Lib/Document/CRTPSubDocument.cc

@@ -109,12 +109,25 @@ AssSubDocument::initFromPath(const QString &path)
     factory.getStyles(styles);
     factory.getLines(lines);
 }
+
 QString
 AssSubDocument::getElementName() const noexcept
 {
     return "AssSubDocument";
 }
 
+const QVector<Ass::LinePtr> &
+AssSubDocument::getLines() const noexcept
+{
+    return lines;
+}
+
+const QVector<Ass::StylePtr> &
+AssSubDocument::getStyles() const noexcept
+{
+    return styles;
+}
+
 QJsonDocument
 AssSubDocument::getProperties() const noexcept
 {