{"ast_node_type":"other","tokens":[{"end":61,"kind":"keyword","start":0,"text":"diag.span_note(ambiguity.b1_span,"}]}
    diag.span_note(ambiguity.b1_span, ambiguity.b1_note_msg);
    diag.note(ambiguity.note_msg);
    for help_msg in ambiguity.b1_help_msgs {