getOneEntityByLabel example

$page->fillField('Title', $label);
    if ($publish) {
      $page->findButton('Save')->click();
    }
    else {
      $page->uncheckField('Published');
      $page->findButton('Save')->click();
    }

    $session->getPage()->hasContent("{$label} has been created");

    return $this->getOneEntityByLabel('node', $label);
  }

  /** * Determine if the content list has an entity's label. * * This assertion can be used to validate a particular entity exists in the * current workspace. */
  protected function isLabelInContentOverview($label) {
    $this->drupalGet('/admin/content');
    $session = $this->getSession();