diff --git a/src/flow/binary/avl.rs b/src/flow/binary/avl.rs
index ad287d7..e7ff54d 100644
--- a/src/flow/binary/avl.rs
+++ b/src/flow/binary/avl.rs
@@ -8,7 +8,7 @@ pub trait BinaryTreesAvl<'a>: BinaryTreesHeight<'a> {
         }
     }
 
-    fn join_key_unbalanced(
+    fn try_join(
         &self,
         tl: Self::Tree,
         key: Self::Key,
@@ -33,7 +33,7 @@ pub trait BinaryTreesAvl<'a>: BinaryTreesHeight<'a> {
     ) -> BTWrap<'a, Self, Self::Node> {
         let (hl, hr) = (self.height(&tl), self.height(&tr));
         match (hl.saturating_sub(hr), hr.saturating_sub(hl)) {
-            (0, 0) | (0, 1) | (1, 0) => self.join_key_unbalanced(tl, key, tr),
+            (0, 0) | (0, 1) | (1, 0) => self.try_join(tl, key, tr),
             (0, _) => Self::bind(self.assume_node(&tr), move |nr| {
                 let (trl, trr, kr) = self.split(&nr);
                 let (rlh, rrh) = (self.height(&trl), self.height(&trr));
diff --git a/src/flow/binary/bounds/bound.rs b/src/flow/binary/bounds/bound.rs
index 37b71d7..70d9d42 100644
--- a/src/flow/binary/bounds/bound.rs
+++ b/src/flow/binary/bounds/bound.rs
@@ -159,7 +159,7 @@ impl<'a, BT: BinaryTreesBindable<'a> + BinaryTreesHeight<'a>> BinaryTreesHeight<
 }
 
 impl<'a, BT: BinaryTreesBindable<'a> + BinaryTreesAvl<'a>> BinaryTreesAvl<'a> for BoundTrees<BT> {
-    fn join_key_unbalanced(
+    fn try_join(
         &self,
         tl: Self::Tree,
         key: Self::Key,
@@ -170,7 +170,7 @@ impl<'a, BT: BinaryTreesBindable<'a> + BinaryTreesAvl<'a>> BinaryTreesAvl<'a> fo
             Bounds::join(boundsl.clone(), boundsr.clone(), &key, self.comparator()),
             |bounds| {
                 Self::fmap(
-                    self.0.join_key_unbalanced(tl.bound, key, tr.bound),
+                    self.0.try_join(tl.bound, key, tr.bound),
                     |node| BoundNode2 {
                         boundsl,
                         boundsr,
diff --git a/src/mrds/trees/avl.rs b/src/mrds/trees/avl.rs
index 4270243..c8daf06 100644
--- a/src/mrds/trees/avl.rs
+++ b/src/mrds/trees/avl.rs
@@ -187,7 +187,7 @@ impl<'a, A: 'a + PartialOrd + Clone> BinaryTreesHeight<'a> for AvlTs<A> {
 }
 
 impl<'a, A: 'a + PartialOrd + Clone> BinaryTreesAvl<'a> for AvlTs<A> {
-    fn join_key_unbalanced(
+    fn try_join(
         &self,
         tl: Self::Tree,
         key: Self::Key,
diff --git a/src/rstd/collections/avl/context.rs b/src/rstd/collections/avl/context.rs
index 18bf278..831e862 100644
--- a/src/rstd/collections/avl/context.rs
+++ b/src/rstd/collections/avl/context.rs
@@ -114,7 +114,7 @@ impl<'a, Ctx: Context<'a>, A: Mentionable<'a, Ctx> + Clone, C: 'a + Comparator<A
 impl<'a, Ctx: Context<'a>, A: Mentionable<'a, Ctx> + Clone, C: 'a + Comparator<A>>
     BinaryTreesAvl<'a> for BoundContext<'a, Ctx, A, C>
 {
-    fn join_key_unbalanced(
+    fn try_join(
         &self,
         tl: Self::Tree,
         key: Self::Key,