{"ast_node_type":"variable","tokens":[{"end":78,"kind":"keyword","start":0,"text":"let"}]}
        let binop: ast::BinExpr = find_node_at_offset(file.syntax(), offset)?;
    fn assign_to_eq(file: &SourceFile, offset: TextSize) -> Option<TextEdit> {
        if !matches!(binop.op_kind(), Some(ast::BinaryOp::CmpOp(ast::CmpOp::Eq { negated: false })))