syntax_data: {"ast_node_type":"other","tokens":[{"end":73,"kind":"keyword","start":0,"text":"///"}]}
source_snippet:     /// When inside the LHS of an assignment to a field, this is the type
context_before:     body_target_features: &'tcx [TargetFeature],
context_after:     /// of the LHS and the span of the assignment expression.