Know if a property is required for current validation groups using Validator metadatas

validation.php

<?php

function isRequired($object, $property, $validationGroups = ['Default'])
{
    $classMetadata = $this->validator->getMetadataFor($object);
    $propertyMetadatas = $classMetadata->getPropertyMetadata($property);

    foreach ($propertyMetadatas as $propertyMetadata) {
        $constraintsByGroups = $propertyMetadata->constraintsByGroup;

        foreach ($constraintsByGroups as $group => $constraints) {
            if (!in_array($group, $validationGroups)) {
                continue;
            }

            foreach ($constraints as $constraint) {
                if ($constraint instanceof NotBlank) {
                    return true;
                }
            }
        }
    }

    return false;
}