/guava/android/guava/src/com/google/common/collect/CompactHashMap.java
if ( index == -1 ) { return NOT_FOUND; }
CompactHashing.remove( key, mask, requireTable(), requireEntries(), requireKeys(), <extra_id_0> Object oldValue = value(index); moveLastEntry(index, mask); size--; incrementModCount(); return oldValue; }