public function get_argument( $index, $default = null ) {
		$arguments = $this->get_arguments();
		$argument  = Arr::get( $arguments, $index, $default );

		/**
		 * Applies a filter to a specific shortcode argument, catch all for all shortcodes..
		 *
		 * @since  4.7.5
		 *
		 * @param  mixed  $argument   The argument.
		 * @param  array  $index      Which index we indent to fetch from the arguments.
		 * @param  array  $default    Default value if it doesnt exist.
		 * @param  static $instance   Which instance of shortcode we are dealing with.
		 */
		$argument = apply_filters( 'tribe_events_pro_shortcode_argument', $argument, $index, $default, $this );

		$registration_slug = $this->get_registration_slug();

		/**
		 * Applies a filter to a specific shortcode argument, to a particular registration slug.
		 *
		 * @since  4.7.5
		 *
		 * @param  mixed  $argument   The argument value.
		 * @param  array  $index      Which index we indent to fetch from the arguments.
		 * @param  array  $default    Default value if it doesnt exist.
		 * @param  static $instance   Which instance of shortcode we are dealing with.
		 */
		$argument = apply_filters( "tribe_events_pro_shortcode_{$registration_slug}_argument", $argument, $index, $default, $this );

		return $argument;
	}