ConstraintValidatorFactory::getInstance

public ConstraintValidatorFactory::getInstance(Constraint $constraint)

public function getInstance(Constraint $constraint) {
  $class_name = $constraint->validatedBy();

  if (!isset($this->validators[$class_name])) {
    $this->validators[$class_name] = $this->classResolver->getInstanceFromDefinition($class_name);
  }

  return $this->validators[$class_name];
}