AdvanceKeyCombo = function (event, combo)
{
    combo.timeLastMatched = event.timeStamp;
    combo.index++;

    if (combo.index === combo.size)
    {
        return true;
    }
    else
    {
        combo.current = combo.keyCodes[combo.index];
        return false;
    }
}
Used internally by the KeyCombo class.
Return `true` if it reached the end of the combo, `false` if not.

@function Phaser.Input.Keyboard.AdvanceKeyCombo
@private
@since 3.0.0

@param {KeyboardEvent} event - The native Keyboard Event.
@param {Phaser.Input.Keyboard.KeyCombo} combo - The KeyCombo object to advance.

@return {boolean} `true` if it reached the end of the combo, `false` if not.