static GazelleV_LeftArrowScript.Script leftArrowParseVerbose(S script) {
  new GazelleV_LeftArrowScriptParser parser;
  enableScaffolding(parser);
  parser.allowTheWorld();
  var parsedScript = parser.parse(script);
  printIndentedStruct(parsedScript, GazelleV_LeftArrowScript.structureDataForLAS());
  ret parsedScript;
}