public int getFeatureFlags() {
		return feature_flags_;
	}
CDEX Header extends DEX header, but adds additional members

class Header : public DexFile::Header {


https://android.googlesource.com/platform/art/+/master/libdexfile/dex/compact_dex_file.h
Ghidra/Features/FileFormats/src/main/java/ghidra/file/formats/android/cdex/CDexHeader.java