You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/lemmy/crates/apub/src/protocol/activities/community
    
    the code of the file until where you have to start completion: pub mod announce;
pub mod collection_add;
pub mod collection_remove;
pub mod lock_page;
pub mod report;
pub mod update;

#[cfg(test)]
mod tests {
  use crate::protocol::{
    activities::community::{
      announce::AnnounceActivity,
      collection_add::CollectionAdd,
      collection_remove::CollectionRemove,
      lock_page::{LockPage, UndoLockPage},
      report::Report,
      update::UpdateCommunity,
    },
    tests::test_parse_lemmy_item,
  };
  use lemmy_utils::error::LemmyResult;

  #[test]

    
  fn test_parse_lemmy_community_activities() -> LemmyResult<()> {
    test_parse_lemmy_item::<AnnounceActivity>(
      "assets/lemmy/activities/community/announce_create_page.json",
    )?;

    test_parse_lemmy_item::<CollectionAdd>("assets/lemmy/activities/community/add_mod.json")?;
    test_parse_lemmy_item::<CollectionRemove>("assets/lemmy/activities/community/remove_mod.json")?;

    test_parse_lemmy_item::<CollectionAdd>(
      "assets/lemmy/activities/community/add_featured_post.json",
    )?;
    test_parse_lemmy_item::<CollectionRemove>(
      "assets/lemmy/activities/community/remove_featured_post.json",
    )?;

    test_parse_lemmy_item::<LockPage>("assets/lemmy/activities/community/lock_page.json")?;
    test_parse_lemmy_item::<UndoLockPage>("assets/lemmy/activities/community/undo_lock_page.json")?;

    test_parse_lemmy_item::<UpdateCommunity>(
      "assets/lemmy/activities/community/update_community.json",
    )?;

    test_parse_lemmy_item::<Report>("assets/lemmy/activities/community/report_page.json")?;
    Ok(())
  }