syntax_data: {"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"if"}]}
source_snippet:                             if !self.thir[arg].ty.is_freeze(self.tcx, self.typing_env) =>
context_before:                         BorrowKind::Fake(_) | BorrowKind::Shared
context_after:                         {