syntax_data: {"ast_node_type":"variable","tokens":[{"end":83,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:         if let ty::GenericArgKind::Const(c) = self.kind() { Some(c) } else { None }
context_before:     fn as_const(&self) -> Option<I::Const> {
context_after:     }