Doctrine\ODM\MongoDB\Mapping\MappingException::invalidDiscriminatorValue PHP Method

    public static function invalidDiscriminatorValue($value, $owningClass)
    {
        return new self("Discriminator value '{$value}' used in the declaration of class '{$owningClass}' does not exist.");
    }

 /**
  * Sets the default discriminator value to be used for this class
  * Used for JOINED and SINGLE_TABLE inheritance mapping strategies if the document has no discriminator value
  *
  * @param string $defaultDiscriminatorValue
  *
  * @throws MappingException
  */
 public function setDefaultDiscriminatorValue($defaultDiscriminatorValue)
 {
     if ($defaultDiscriminatorValue === null) {
         $this->defaultDiscriminatorValue = null;
         return;
     }
     if (!array_key_exists($defaultDiscriminatorValue, $this->discriminatorMap)) {
         throw MappingException::invalidDiscriminatorValue($defaultDiscriminatorValue, $this->name);
     }
     $this->defaultDiscriminatorValue = $defaultDiscriminatorValue;
 }