syntax_data: {"ast_node_type":"other","tokens":[{"end":54,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:             // Inline-context or inline-parent format.
context_before:         if self.len_with_tag_or_marker != BASE_LEN_INTERNED_MARKER {
context_after:             let lo = self.lo_or_index;