@Nullable
    public V get(Object key) {
        final int index = indexOfKey(key);
        return index >= 0 ? (V) mArray[(index << 1) + 1] : null;
    }
Retrieve a value from the array.

@param key The key of the value to retrieve.
@return Returns the value associated with the given key,
or null if there is no such key.
android/android_framework/base/src/main/java/github/tornaco/android/thanos/core/util/collection/SimpleArrayMap.java