fix: public getter

src/tree.rs

@@ -136,7 +136,7 @@ where
     }
 
     // Recalculates `Merkle Tree` from the specified key
-    fn recalculate_from(&mut self, key: usize) -> PmtreeResult<()> {
+    pub fn recalculate_from(&mut self, key: usize) -> PmtreeResult<()> {
         let mut depth = self.depth;
         let mut i = key;
 
@@ -174,6 +174,15 @@ where
         Ok(res)
     }
 
+    // Returns the leaf by the key
+    pub fn get(&self, key: usize) -> PmtreeResult<H::Fr> {
+        if key >= self.capacity() {
+            return Err(PmtreeErrorKind::TreeError(TreeErrorKind::IndexOutOfBounds));
+        }
+
+        self.get_elem(Key(self.depth, key))
+    }
+
     /// Deletes a leaf at the `key` by setting it to its default value
     pub fn delete(&mut self, key: usize) -> PmtreeResult<()> {
         if key >= self.next_index {