{"ast_node_type":"function","tokens":[{"end":92,"kind":"keyword","start":0,"text":"fn"}]}
    fn size_of_sized(&self, ty: &Ty, locals: &Locals, what: &'static str) -> Result<usize> {
    /// be something that complete this: `error: type {ty} was unsized. {what} should be sized`
        match self.size_align_of(ty, locals)? {