code: func NewIndicesGetMappingService(client *Client) *IndicesGetMappingService {
  	return &IndicesGetMappingService{
  		client: client,
  		index:  make([]string, 0),
  		typ:    make([]string, 0),
  	}
  }
docs: // NewIndicesGetMappingService creates a new IndicesGetMappingService.