message: HeapSummary::total_allocated_bytes
  Summary: Shortcut, used in the following diff
diff: @@ -121,6 +121,11 @@ impl HeapSummary {
  pub fn summary(&self) -> HashMap<String, (usize, usize)> {
  self.summary.clone()
  }
  +
  + /// Total number of bytes allocated.
  + pub fn total_allocated_bytes(&self) -> usize {
  + self.summary.values().map(|(_, s)| *s).sum()
  + }
  }
  pub(crate) trait ArenaVisitor<'v> {
  