syntax_data: {"ast_node_type":"other","tokens":[{"end":59,"kind":"keyword","start":0,"text":"\"a"}]}
source_snippet:         "a list LLVM plugins to enable (space separated)"),
context_before:     llvm_plugins: Vec<String> = (Vec::new(), parse_list, [TRACKED],
context_after:     llvm_time_trace: bool = (false, parse_bool, [UNTRACKED],