Don't insert imports outside of cfg attributed items

crates/syntax/src/ast/node_ext.rs

@@ -8,7 +8,7 @@ use parser::SyntaxKind;
 use rowan::{GreenNodeData, GreenTokenData};
 
 use crate::{
-    ast::{self, support, AstNode, AstToken, AttrsOwner, NameOwner, SyntaxNode},
+    ast::{self, support, AstChildren, AstNode, AstToken, AttrsOwner, NameOwner, SyntaxNode},
     NodeOrToken, SmolStr, SyntaxElement, SyntaxToken, TokenText, T,
 };
 
@@ -45,6 +45,12 @@ fn text_of_first_token(node: &SyntaxNode) -> TokenText<'_> {
     }
 }
 
+impl ast::BlockExpr {
+    pub fn items(&self) -> AstChildren<ast::Item> {
+        support::children(self.syntax())
+    }
+}
+
 #[derive(Debug, PartialEq, Eq, Clone)]
 pub enum Macro {
     MacroRules(ast::MacroRules),