Remove mutable api

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "rowan"
-version = "0.15.19"
+version = "0.17.0"
 authors = ["Aleksey Kladov <aleksey.kladov@gmail.com>"]
 repository = "https://github.com/rust-analyzer/rowan"
 license = "MIT OR Apache-2.0"

src/api.rs

@@ -1,4 +1,4 @@
-use std::{borrow::Cow, fmt, iter, marker::PhantomData, ops::Range};
+use std::{fmt, iter, marker::PhantomData};
 
 use crate::{
     cursor, green::GreenTokenData, Direction, GreenNode, GreenNodeData, GreenToken, NodeOrToken,
@@ -121,7 +121,7 @@ impl<L: Language> SyntaxNode<L> {
         self.raw.text()
     }
 
-    pub fn green(&self) -> Cow<'_, GreenNodeData> {
+    pub fn green(&self) -> &GreenNodeData {
         self.raw.green()
     }
 
@@ -243,23 +243,6 @@ impl<L: Language> SyntaxNode<L> {
     pub fn clone_subtree(&self) -> SyntaxNode<L> {
         SyntaxNode::from(self.raw.clone_subtree())
     }
-
-    pub fn clone_for_update(&self) -> SyntaxNode<L> {
-        SyntaxNode::from(self.raw.clone_for_update())
-    }
-
-    pub fn is_mutable(&self) -> bool {
-        self.raw.is_mutable()
-    }
-
-    pub fn detach(&self) {
-        self.raw.detach()
-    }
-
-    pub fn splice_children(&self, to_delete: Range<usize>, to_insert: Vec<SyntaxElement<L>>) {
-        let to_insert = to_insert.into_iter().map(cursor::SyntaxElement::from).collect::<Vec<_>>();
-        self.raw.splice_children(to_delete, to_insert)
-    }
 }
 
 impl<L: Language> SyntaxToken<L> {
@@ -331,10 +314,6 @@ impl<L: Language> SyntaxToken<L> {
     pub fn prev_token(&self) -> Option<SyntaxToken<L>> {
         self.raw.prev_token().map(SyntaxToken::from)
     }
-
-    pub fn detach(&self) {
-        self.raw.detach()
-    }
 }
 
 impl<L: Language> SyntaxElement<L> {
@@ -393,12 +372,6 @@ impl<L: Language> SyntaxElement<L> {
             NodeOrToken::Token(it) => it.prev_sibling_or_token(),
         }
     }
-    pub fn detach(&self) {
-        match self {
-            NodeOrToken::Node(it) => it.detach(),
-            NodeOrToken::Token(it) => it.detach(),
-        }
-    }
 }
 
 #[derive(Debug, Clone)]

src/ast.rs

@@ -39,13 +39,6 @@ pub trait AstNode {
 
     fn syntax(&self) -> &SyntaxNode<Self::Language>;
 
-    fn clone_for_update(&self) -> Self
-    where
-        Self: Sized,
-    {
-        Self::cast(self.syntax().clone_for_update()).unwrap()
-    }
-
     fn clone_subtree(&self) -> Self
     where
         Self: Sized,