message: (Remove unused import)
diff: use std::ptr;
  -use libhdf5_sys::h5p::{H5P_iterate_t, H5Pcopy, H5Pequal, H5Pexist, H5Piterate};
  +use libhdf5_sys::h5p::{H5Pcopy, H5Pequal, H5Pexist, H5Piterate};
  use crate::internal_prelude::*;
  