message: Inline `GraphBase` method implementations for `Graph`
diff: @@ -540,12 +540,15 @@ where
  Ty: EdgeType,
  Ix: IndexType,
  {
  + #[inline]
  fn node_bound(&self) -> usize {
  self.node_count()
  }
  + #[inline]
  fn to_index(&self, ix: NodeIndex<Ix>) -> usize {
  ix.index()
  }
  + #[inline]
  fn from_index(&self, ix: usize) -> Self::NodeId {
  NodeIndex::new(ix)
  }
  