/**
	 * Check if any values are set in the active array
	 *
	 * @return  bool  Returns true if the active array is not empty, false otherwise
	 * @since   3.2.0
	 */
	public function isActive(): bool;

	/**
	 * Set content
	 *
	 * @param   string  $key    The main string key
	 * @param   mixed   $value  The values to set
	 *
	 * @return  void
	 * @since 3.2.0
	 */
	public function set(string $key, $value);

	/**
	 * Get content
	 *
	 * @param   string  $key    The main string key
	 * @param   mixed   $value  The values to set
	 *
	 * @return  mixed
	 * @since 3.2.0
	 */
	public function get(string $key);

	/**
	 * Does key exist
	 *
	 * @param   string  $key    The main string key
	 *
	 * @return  bool
	 * @since 3.2.0
	 */
	public function exist(string $key): bool;

	/**
	 * Add content
	 *
	 * @param   string  $key    The main string key
	 * @param   mixed   $value  The values to set
	 *
	 * @return  void
	 * @since 3.2.0
	 */
	public function add(string $key, $value);

	/**
	 * Remove content
	 *
	 * @param   string     $key     The main string key
	 *
	 * @return  void
	 * @since 3.2.0
	 */
	public function remove(string $key);