feat: Introduced 'remove' method for 'near_sdk::store::Lazy' collecti…

…on (#1238)

near-sdk/src/store/lazy/mod.rs

@@ -119,6 +119,11 @@ where
  }
  }
  }
+
+ /// Removes the underlying storage item. Useful for deprecating the obsolete [`Lazy`] values.
+ pub fn remove(&mut self) -> bool {
+ env::storage_remove(&self.storage_key)
+ }
 }
 
 impl<T> Lazy<T>
@@ -185,6 +190,15 @@ mod tests {
  assert_eq!(lazy_loaded, b);
  }
 
+ #[test]
+ pub fn test_remove() {
+ let mut lazy = Lazy::new(b"m", 8u8);
+ lazy.flush();
+ assert!(env::storage_has_key(b"m"));
+ lazy.remove();
+ assert!(!env::storage_has_key(b"m"));
+ }
+
  #[test]
  pub fn test_debug() {
  let mut lazy = Lazy::new(b"m", 8u8);