Stream::clear() to purge input?

[JAndrassy]

Long time ago flush() changed from "purge input" to "send output buffer" and moved from Stream to Print.
But now there is no method to "purge input".
Arduino classes and methods are inspired by the Processing language.
Processing has clear(). It could be added to Stream as virtual with some default implementation using read() or readBytes(&b, 1).

[matthijskooijman]

I like clear() as a name for such a method, seems clear to me.

[JAndrassy]

I realized that clearing the input with timeout is possible with find so clear() wold be

void clear() {
  while (available()) {
    read();
  }
}