message: transpiler helper cleanup
diff: @@ -31,16 +31,6 @@ export function prefix(opParser: P.MonadicParser<any>, nextParser: P.MonadicPars
  return parser;
  }
  -export function prefixRemoveKet(opParser: P.MonadicParser<any>, nextParser: P.MonadicParser<any>, mapFn: any) {
  - const parser: P.MonadicParser<any> = P.MonadicParser.lazy(() => {
  - return P.MonadicParser.seq(opParser, parser.skip(P.MonadicParser.regexp(/\s*\)/)))
  - .map(x => mapFn(...x))
  - .or(nextParser);
  - });
  - return parser;
  -}
  -
  -
  // Ideally this function would be just like `PREFIX` but reordered like
  // `P.seq(parser, opParser).or(nextParser)`, but that doesn't work. The
  // reason for that is that Parsimmon will get stuck in infinite recursion, since
  @@ -138,10 +128,6 @@ export function prefixOp(re: RegExp, group: number = 0) {
  return P.MonadicParser.regexp(re, group).skip(P.MonadicParser.optWhitespace);
  }
  -export function prefixOpNoWhiteSpace(re: RegExp, group: number = 0) {
  - return P.MonadicParser.regexp(re, group).skip(P.MonadicParser.regexp(/\s*/));
  -}
  -
  export function postfixOp(re: RegExp, group: number = 0) {
  return P.MonadicParser.optWhitespace.then(P.MonadicParser.regexp(re, group));
  }
  @@ -364,18 +350,18 @@ const residueProps = ['residueKey', 'label_comp_id', 'label_seq_id', 'auth_comp_
  export function testLevel(property: any) {
  if (property.head.name.startsWith(propPrefix)) {
  const name = property.head.name.substr(propPrefix.length);
  - if (entityProps.indexOf(name) !== -1) return 'entity-test' as string;
  - if (chainProps.indexOf(name) !== -1) return 'chain-test' as string;
  - if (residueProps.indexOf(name) !== -1) return 'residue-test' as string;
  + if (entityProps.includes(name)) return 'entity-test';
  + if (chainProps.includes(name)) return 'chain-test';
  + if (residueProps.includes(name)) return 'residue-test';
  }
  - return 'atom-test' as string;
  + return 'atom-test';
  }
  const flagProps = [
  'structure-query.atom-property.macromolecular.secondary-structure-flags'
  ];
  export function valuesTest(property: any, values: any[]) {
  - if (flagProps.indexOf(property.head.name) !== -1) {
  + if (flagProps.includes(property.head.name)) {
  const name = values[0].head;
  const flags: any[] = [];
  values.forEach(v => flags.push(...v.args[0]));
  