email.php

<?php
namespace Plumbok\Test;

/**
 * @Value
 */
class Email
{
  private $email = '';
  
  private function setEmail(string $email)
  {
    if (!valid($email)) {
      throw new InvalidArgumentException("Email address is invalid, given: {$email}");
    }
    $this->email = $email;
  }
}

processed.php

<?php
namespace Plumbok\Test;

/**
 * @Value
 */
class Email
{
  private $email = '';
  
  private function setEmail(string $email)
  {
    if (!valid($email)) {
      throw new InvalidArgumentException("Email address is invalid, given: {$email}");
    }
    $this->email = $email;
  }
  
  // generated code
  /**
   * Email constructor.
   *
   * @param string $email
   */
  public function __construct(string $email)
  {
    $this->setEmail($email);
  }
  
  /**
   * Retrieves email
   *
   * @return string
   */
  public function getEmail() : string
  {
    return $this->email;
  }
  
  /**
   * Compares two emails
   *
   * @return boolean
   */
  public function equal(Email $other) : bool
  {
    return get_class($this) === get_class($other) && $this->email == $other->email;
  }
}