FieldConfig::getFieldStorageDefinition

public FieldConfig::getFieldStorageDefinition()

public function getFieldStorageDefinition() {
  if (!$this->fieldStorage) {
    $fields = $this->entityManager()->getFieldStorageDefinitions($this->entity_type);
    if (!isset($fields[$this->field_name])) {
      throw new FieldException("Attempt to create a field {$this->field_name} that does not exist on entity type {$this->entity_type}.");
    }
    if (!$fields[$this->field_name] instanceof FieldStorageConfigInterface) {
      throw new FieldException("Attempt to create a configurable field of non-configurable field storage {$this->field_name}.");
    }
    $this->fieldStorage = $fields[$this->field_name];
  }

  return $this->fieldStorage;
}