/**
  * Set the default content type and it's palettes.
  *
  * @param array $allowedElements List of allowed types.
  *
  * @return void
  */
 private function setDefaults($allowedElements)
 {
     $default = key(reset($allowedElements));
     $this->definition->set('fiedls/type/default', $default);
     $this->definition->set('palettes/default', $this->definition->get('palettes/' . $default));
 }