Method find

Sming/Core/Data/ObjectMap.h:223–227

* @brief Find the value for a given key, if it exists * @param key * @retval V* Points to the object if it exists, otherwise nullptr * @note If you need to modify the existing map entry, use `operator[]` or `valueAt()` */

	 * @note If you need to modify the existing map entry, use `operator[]` or `valueAt()`
	 */
	V* find(const K& key) const
	{
		int index = entries.indexOf(key);
		return (index < 0) ? nullptr : entries[index].value.get();
	}

	/**
	 * @brief Get the index of a key