Representations of pressable keys that aren't text. These are stored in the Unicode PUA (Private Use Area) code points, 0xE000-0xF8FF. Refer to http://www.google.com.au/search?&q=unicode+pua&btnG=Search NOTE: A class was used instead of an Enum so that it could be extended in Protractor
Simulate pressing many keys at once in a "chord". Takes a sequence of {@link webdriver.Key}s or strings, appends each of the values to a string, and adds the chord termination key ({@link webdriver.Key.NULL}) and returns the resultant string.
Note: when the low-level webdriver key handlers see Keys.NULL, active modifier keys (CTRL/ALT/SHIFT/etc) release via a keyup event.
The key sequence to concatenate.
string
The null-terminated key sequence.