syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"environment"}]}
source_snippet:         environment variable `RUSTC_GRAPHVIZ_FONT` (default: `Courier, monospace`)"),
context_before:         "use the given `fontname` in graphviz output; can be overridden by setting \
context_after:     has_thread_local: Option<bool> = (None, parse_opt_bool, [TRACKED],