class MapDataDefinition

class MapDataDefinition extends ComplexDataDefinitionBase {
  
  /**
   * The name of the main property, or NULL if there is none.
   *
   * @var string
   */
  protected $mainPropertyName = NULL;
  
  /**
   * Creates a new map definition.
   *
   * @param string $type
   *   (optional) The data type of the map. Defaults to 'map'.
   *
   * @return static
   */
  public static function create($type = 'map') {
    $definition['type'] = $type;
    return new static($definition);
  }
  
  /**
   * {@inheritdoc}
   */
  public static function createFromDataType($data_type) {
    return static::create($data_type);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getPropertyDefinitions() {
    if (!isset($this->propertyDefinitions)) {
      $this->propertyDefinitions = [];
    }
    return $this->propertyDefinitions;
  }
  
  /**
   * Sets the definition of a map property.
   *
   * @param string $name
   *   The name of the property to define.
   * @param \Drupal\Core\TypedData\DataDefinitionInterface|null $definition
   *   (optional) The property definition to set, or NULL to unset it.
   *
   * @return $this
   */
  public function setPropertyDefinition($name, ?DataDefinitionInterface $definition = NULL) {
    if (isset($definition)) {
      $this->propertyDefinitions[$name] = $definition;
    }
    else {
      unset($this->propertyDefinitions[$name]);
    }
    return $this;
  }
  
  /**
   * {@inheritdoc}
   */
  public function getMainPropertyName() {
    return $this->mainPropertyName;
  }
  
  /**
   * Sets the main property name.
   *
   * @param string|null $name
   *   The name of the main property, or NULL if there is none.
   *
   * @return $this
   */
  public function setMainPropertyName($name) {
    $this->mainPropertyName = $name;
    return $this;
  }

}