syntax_data: {"ast_node_type":"other","tokens":[{"end":69,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // mode, however, the `#[thread_local]` attribute works (i.e.
context_before:         // otherwise they're basically ignored by the standard library. In this
context_after:         // `has_thread_local`) and we need to get it to work by specifying