rem: switch (keyIdentifier) 
add: if (keyIdentifier >= "0" && keyIdentifier <= "9") { return true; }  if (keyIdentifier >= "A" && keyIdentifier <= "Z") { return true; }  switch (keyIdentifier) 
context: qx.Proto.isValidKeyIdentifier = function(keyIdentifier) {  if (this._identifierToKeyCodeMap[keyIdentifier]) {     return true;   }  if (keyIdentifier.length != 1) {     return false;   }    if (keyIdentifier >= "0" && keyIdentifier <= "9") {     return true;   }    if (keyIdentifier >= "A" && keyIdentifier <= "Z") {     return true;   }  switch (keyIdentifier)   {    case "+":    case "-":    case "*":    case "/":      return true;    default:      return false;  }};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/d9c1e465c189b0e2a300f0500ef727660a01e7f1/KeyEventHandler.js/buggy/qooxdoo/frontend/framework/source/class/qx/event/handler/KeyEventHandler.js