in core/src/main/java/gnu/trove/TObjectLongHashMap.java [338:348]
public boolean containsValue(long val) {
Object[] keys = _set;
long[] vals = _values;
for (int i = keys.length; i-- > 0; ) {
if (keys[i] != null && keys[i] != REMOVED && val == vals[i]) {
return true;
}
}
return false;
}