public Object getAttribute(File file, String attribute) {
    String view = getViewName(attribute);
    String attr = getSingleAttribute(attribute);
    return getAttribute(file, view, attr);
  }
Gets the value of the given attribute for the given file. {@code attribute} must be of the form
"view:attribute" or "attribute".
jimfs/src/main/java/com/google/common/jimfs/AttributeService.java