message: [pdsl_core] Make storage::Vec and storage::vec::Iter derive Debug
diff: @@ -25,6 +25,7 @@ use std::iter::{
  ///
  /// Allows to store up to `2^32` elements and is guaranteed to not reallocate
  /// upon pushing new elements to it.
  +#[derive(Debug)]
  pub struct Vec<T> {
  /// The length of the vector.
  len: SyncCell<u32>,
  @@ -33,6 +34,7 @@ pub struct Vec<T> {
  }
  /// An iterator over the values of a storage `Vec`.
  +#[derive(Debug)]
  pub struct Iter<'a, T> {
  /// The storage vector to iterate over.
  vec: &'a Vec<T>,
  