{"ast_node_type":"variable","tokens":[{"end":59,"kind":"keyword","start":0,"text":"let"}]}
    let match_arm = ctx.find_node_at_offset::<MatchArm>()?;
pub(crate) fn move_guard_to_arm_body(acc: &mut Assists, ctx: &AssistContext<'_>) -> Option<()> {
    let guard = match_arm.guard()?;