message: Rename IndPtr::slice to IndPtr::as_slice
diff: @@ -97,7 +97,7 @@ where
  /// Return a view on the underlying slice if it is a proper `indptr` slice,
  /// which is the case if its first element is 0. `None` will be returned
  /// otherwise.
  - pub fn slice(&self) -> Option<&[Iptr]> {
  + pub fn as_slice(&self) -> Option<&[Iptr]> {
  if self.is_proper() {
  Some(&self.storage[..])
  } else {
  