How to use the quicktype-core/dist/language/JavaScript.legalizeName function in quicktype-core

function quotePropertyName(original: string): string {
  const escaped = utf16StringEscape(original)
  const quoted = `"${escaped}"`

  if (original.length === 0) {
    return quoted
  } else if (!isES3IdentifierStart(original.codePointAt(0) as number)) {
    return quoted
  } else if (escaped !== original) {
    return quoted
  } else if (legalizeName(original) !== original) {
    return quoted
  } else {
    return original
  }
}