{"ast_node_type":"variable","tokens":[{"end":73,"kind":"keyword","start":0,"text":"if"}]}
    if let Some(match_arm) = ctx.find_node_at_offset::<ast::MatchArm>() {
fn get_replacement_node(ctx: &AssistContext<'_>) -> Option<(ParentType, ast::Expr)> {
        let match_arm_expr = match_arm.expr()?;