syntax_data: {"ast_node_type":"variable","tokens":[{"end":45,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let body = tcx.hir_body_owned_by(fn_def);
context_before:     // Figure out what primary body this item has.
context_after:     let span_with_body = tcx.hir_span_with_body(fn_id);