syntax_data: {"ast_node_type":"other","tokens":[{"end":58,"kind":"keyword","start":0,"text":"(\"trustzone\","}]}
source_snippet:     ("trustzone", Unstable(sym::arm_target_feature), &[]),
context_before:     ("thumb2", Unstable(sym::arm_target_feature), &[]),
context_after:     ("v5te", Unstable(sym::arm_target_feature), &[]),