Bridge/Doctrine/ORM/Listener/LoadMetadataListener.php
private function configureTaxableMapping(LoadClassMetadataEventArgs $eventArgs)
    {
        /** @var ClassMetadata $metadata */
        $metadata = $eventArgs->getClassMetadata();
        $class = $metadata->getName();

        // Check class
        if (!is_subclass_of($class, Pricing\Model\TaxableInterface::class)) {
            return;
        }

        // Don't add twice
        if (in_array($class, $this->taxableClassCache)) {
            return;
        }

        if (!$metadata->hasAssociation('taxGroup')) {
            $metadata->mapManyToOne([
                'fieldName'    => 'taxGroup',
                'targetEntity' => Pricing\Entity\TaxGroup::class,
                'joinColumns'  => [
                    [
                        'name'                 => 'tax_group_id',
                        'referencedColumnName' => 'id',
                        'onDelete'             => 'RESTRICT',
                        'nullable'             => true,
                    ],
                ],
            ]);
        }

        // Cache class
        $this->taxableClassCache[] = $class;
    }
private function configureTaxableMapping(LoadClassMetadataEventArgs $eventArgs)
    {
        /** @var ClassMetadata $metadata */
        $metadata = $eventArgs->getClassMetadata();
        $class = $metadata->getName();

        // Check class
        if (!is_subclass_of($class, Pricing\Model\TaxableInterface::class)) {
            return;
        }

        // Don't add twice
        if (in_array($class, $this->taxableClassCache)) {
            return;
        }

        if (!$metadata->hasAssociation('taxGroup')) {
            $metadata->mapManyToOne([
                'fieldName'    => 'taxGroup',
                'targetEntity' => Pricing\Entity\TaxGroup::class,
                'joinColumns'  => [
                    [
                        'name'                 => 'tax_group_id',
                        'referencedColumnName' => 'id',
                        'onDelete'             => 'RESTRICT',
                        'nullable'             => true,
                    ],
                ],
            ]);
        }

        // Cache class
        $this->taxableClassCache[] = $class;
    }
Configures the taxable mapping.

@param LoadClassMetadataEventArgs $eventArgs