akaunting/app/Traits/Tenants.php

<?php

namespace App\Traits;

use App\Scopes\Company;

trait Tenants
{
    /**
     * The "booting" method of the model.
     *
     * @return void
     */
    protected static function bootTenants()
    {
        static::addGlobalScope(new Company);
    }

    public function isTenantable()
    {
        $tenantable = $this->tenantable ?? true;

        return ($tenantable === true) && in_array('company_id', $this->getFillable());
    }

    public function isNotTenantable()
    {
        return !$this->isTenantable();
    }
}