message: [examples/enzyme] Use spin::Mutex and alloc::string::String in utils
diff: @@ -14,7 +14,10 @@ use pdsl_core::{
  use parity_codec_derive::{Encode, Decode};
  use lazy_static::lazy_static;
  -use std::sync::Mutex;
  +use spin::Mutex;
  +
  +use alloc::string::String;
  +
  pub type Address = [u8; 32];
  