initial_response {
  [search.now.wire.feed.FeedResponse.feed_response] {
    data_operation {
      operation: CLEAR_ALL
    }
    data_operation {
      operation: UPDATE_OR_APPEND
      metadata {
        content_id {
          content_domain: "root"
          id: 0
          table: "FEATURE"
        }
      }
      feature {
        renderable_unit: STREAM
      }
    }
    data_operation {
      operation: UPDATE_OR_APPEND
      metadata {
        content_id {
          content_domain: "hello-world"
          id: 1
          table: "feature"
        }
      }
      feature {
        parent_id {
          content_domain: "root"
          id: 0
          table: "FEATURE"
        }
        renderable_unit: CARD
        [search.now.ui.stream.Card.card_extension] {
          [search.now.ui.stream.SwipeActionExtension.swipe_action_extension] {
            swipe_action {
              [search.now.ui.action.FeedAction.feed_action_extension] {
                metadata {
                  type: DISMISS_LOCAL
                  dismiss_data {
                    content_id {
                      content_domain: "hello-world"
                      id: 1
                      table: "feature"
                    }
                    data_operations {
                      operation: REMOVE
                      metadata {
                        content_id {
                          content_domain: "root"
                          id: 0
                          table: "FEATURE"
                        }
                      }
                      feature {
                        parent_id {
                          content_domain: "root"
                          id: 0
                          table: "FEATURE"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
    data_operation {
      operation: UPDATE_OR_APPEND
      metadata {
        content_id {
          content_domain: "hello-world"
          id: 10
          table: "feature"
        }
      }
      feature {
        parent_id {
          content_domain: "hello-world"
          id: 1
          table: "feature"
        }
        renderable_unit: CONTENT
        [search.now.ui.stream.Content.content_extension] {
          type: PIET
          [search.now.ui.stream.PietContent.piet_content_extension] {
            frame {
              contents {
                element {
                  text_element {
                    parameterized_text {
                      text: "Hello, World!"
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  }
}