/guava/guava/src/com/google/common/collect/CompactHashMap.java
keys[dstIndex] = false;
keys[dstIndex] = null;
entry = entries[entryIndex]; next = CompactHashing.getNext(entry, mask); } while (next != srcNext); entries[entryIndex] = CompactHashing.maskCombine(entry, dstIndex + 1, mask); } } else { <extra_id_0> values[dstIndex] = null; entries[dstIndex] = 0; } } int firstEntryIndex() { return isEmpty() ? -1 : 0;