syntax_data: {"ast_node_type":"other","tokens":[{"end":18,"kind":"keyword","start":0,"text":"do_emit!"}]}
source_snippet:         do_emit! {
context_before:         // Strip off the leading prefix.
context_after:             (r0, "0"), (r3, "3"), (r4, "4"), (r5, "5"), (r6, "6"), (r7, "7");