Strings.isEmpty(string);
Returns true if the string has no characters or if the string consists only of white space characters. Otherwise, false is returned.
  isEmpty("");       // returns true
  isEmpty("   ");    // returns true
  isEmpty("  abc");  // returns false
  isEmpty("a");      // returns false
function isEmpty extends Modelica.Icons.Function; input String string; output Boolean result "True, if string is empty"; end isEmpty;