syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"_target_features:"}]}
source_snippet:             _target_features: &rustc_data_structures::fx::FxIndexSet<Symbol>,
context_before:             _reloc_model: crate::spec::RelocModel,
context_after:             _target: &crate::spec::Target,