private int getEncoding() {
    // 0 means encoded as char
    // 1 means encoded as bytes that are all <= 0x7f;
    return (int) (bits1 >> 6) & 0x03;
  }
get rvv internal low bytes. Used by region entries for transferring to storage
geode-core/src/main/java/org/apache/geode/internal/cache/entries/VersionedThinDiskLRURegionEntryHeapStringKey2.java