[
  {"type":"LiteralStringAffix","value":"fr"},
  {"type":"LiteralStringSingle","value":"'"},
  {"type":"LiteralStringInterpol","value":"{"},
  {"type":"Name","value":"header"},
  {"type":"LiteralStringInterpol","value":"}"},
  {"type":"LiteralStringSingle","value":":\\s+'"},
  {"type":"Text","value":"\n"}
]