@Override
    public void clear() {
        if (mSize != 0) {
            freeArrays(mHashes, mArray, mSize);
            mHashes = INT;
            mArray = OBJECT;
            mSize = 0;
        }
    }
Make the array map empty.  All storage is released.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/collection/ArraySet.java