1 files changed, 4 insertions, 0 deletions

diff --git a/crates/ra_syntax/src/yellow.rs b/crates/ra_syntax/src/yellow.rs
index 9b93945cc..a7bfb80e2 100644
--- a/crates/ra_syntax/src/yellow.rs
+++ b/crates/ra_syntax/src/yellow.rs
@@ -177,6 +177,10 @@ impl SyntaxNode {
     pub fn children(&self) -> SyntaxNodeChildren {
         SyntaxNodeChildren(self.0.children())
     }
+
+    pub fn memory_size_of_subtree(&self) -> usize {
+        self.0.memory_size_of_subtree()
+    }
 }
 
 impl fmt::Debug for SyntaxNode {