static ZipEntry firstZipEntry(File inZip) ctex {
  if (inZip == null) null;
  temp ZipFile zipFile = new ZipFile(inZip);
  ret firstZipEntry(zipFile);
}
    
static ZipEntry firstZipEntry(ZipFile zipFile) ctex {
  Enumeration entries = zipFile.entries();
  ret entries.hasMoreElements() ? (ZipEntry) entries.nextElement() : null;
}

Began life as a copy of #1022702