message: Add BlockPayload doc comments.
diff: @@ -221,16 +221,17 @@ impl BlockPayload {
  &self.accusations
  }
  - /// The list of deploy hashes included in the block.
  + /// The list of deploy hashes included in the block, excluding transfers.
  pub(crate) fn deploy_hashes(&self) -> &Vec<DeployHash> {
  &self.deploy_hashes
  }
  - /// The list of deploy hashes included in the block.
  + /// The list of transfer hashes included in the block.
  pub(crate) fn transfer_hashes(&self) -> &Vec<DeployHash> {
  &self.transfer_hashes
  }
  + /// Returns an iterator over all deploys and transfers.
  pub(crate) fn deploys_and_transfers_iter(&self) -> impl Iterator<Item = &DeployHash> {
  self.deploy_hashes()
  .iter()
  