$callables      = $this->get_all_callables();
		$cron_callables = array();
		foreach ( self::ALWAYS_SEND_UPDATES_TO_THESE_OPTIONS as $option_name ) {
			if ( array_key_exists( $option_name, $callables ) ) {
				$cron_callables[ $option_name ] = $callables[ $option_name ];
				continue;
			}

			// Check for the Callable name/key for the option, if different from option name.
			if ( array_key_exists( $option_name, self::OPTION_NAMES_TO_CALLABLE_NAMES ) ) {
				$callable_name = self::OPTION_NAMES_TO_CALLABLE_NAMES[ $option_name ];
				if ( array_key_exists( $callable_name, $callables ) ) {
					$cron_callables[ $callable_name ] = $callables[ $callable_name ];
				}
			}
		}
		return $cron_callables;
	}

	/**
	 * Expand the callables within a hook before they are serialized and sent to the server.
	 *
	 * @access public
	 *
	 * @param array $args The hook parameters.
	 * @return array $args The hook parameters.
	 */
	public function expand_callables( $args ) {
		if ( $args[0] ) {
			$callables           = $this->get_all_callables();
			$callables_checksums = array();
			foreach ( $callables as $name => $value ) {
				$callables_checksums[ $name ] = $this->get_check_sum( $value );
			}
			\Jetpack_Options::update_raw_option( self::CALLABLES_CHECKSUM_OPTION_NAME, $callables_checksums );
			return $callables;
		}

		return $args;
	}

	/**
	 * Return Total number of objects.
	 *
	 * @param array $config Full Sync config.
	 *
	 * @return int total
	 */
	public function total( $config ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
		return count( $this->get_callable_whitelist() );
	}

}