[MarketShip] Change usable box volume for packing.

marketship-change-usable-box-volume.php

<?php

/**
 * Changes the usable box volume for MarketShip's packing algorithm to 100%.
 *
 * @param float $usable_volume Usable volume for packing.
 * @param float $total_volume  Total box volume.
 *
 * @return float Updated usable volume.
 */
function marketship_change_usable_box_volume( $usable_volume, $total_volume ) {
	return $total_volume;
}

add_filter( 'marketship_usable_box_volume', 'marketship_change_usable_box_volume', 10, 2 );