text: from typing import Optional, Union, Sequence
  
  from slack_sdk.web.async_client import AsyncWebClient
  from slack_sdk.models.blocks import Block
  
  
  class AsyncConfigure:
      def __init__(self, *, callback_id: str, client: AsyncWebClient, body: dict):
          self.callback_id = callback_id
          self.client = client
          self.body = body
  
      async def __call__(
          self,
          *,
          blocks: Optional[Sequence[Union[dict, Block]]] = None,
      ) -> None:
          await self.client.views_open(
              trigger_id=self.body["trigger_id"],
              view={
                  "type": "workflow_step",
                  "callback_id": self.callback_id,
                  "blocks": blocks,
              },
          )
  